diff --git a/common/changes/@uifabric/experiments/amyngu-preferConst_2018-04-10-23-09.json b/common/changes/@uifabric/experiments/amyngu-preferConst_2018-04-10-23-09.json
new file mode 100644
index 00000000000000..d67c6f9a773511
--- /dev/null
+++ b/common/changes/@uifabric/experiments/amyngu-preferConst_2018-04-10-23-09.json
@@ -0,0 +1,11 @@
+{
+  "changes": [
+    {
+      "packageName": "@uifabric/experiments",
+      "comment": "prefer const, instead of let, for extendedpicker, floatingpicker, and selecteditemlists",
+      "type": "patch"
+    }
+  ],
+  "packageName": "@uifabric/experiments",
+  "email": "amyngu@microsoft.com"
+}
\ No newline at end of file
diff --git a/packages/experiments/src/components/ExtendedPicker/BaseExtendedPicker.tests.tsx b/packages/experiments/src/components/ExtendedPicker/BaseExtendedPicker.tests.tsx
index 8e9dad90d677e5..9e1679a693996c 100644
--- a/packages/experiments/src/components/ExtendedPicker/BaseExtendedPicker.tests.tsx
+++ b/packages/experiments/src/components/ExtendedPicker/BaseExtendedPicker.tests.tsx
@@ -84,15 +84,15 @@ describe('Pickers', () => {
           onRenderFloatingPicker={ basicRenderFloatingPicker }
         />
       );
-      let tree = component.toJSON();
+      const tree = component.toJSON();
       expect(tree).toMatchSnapshot();
     });
 
     it('force resolves to the first suggestion', () => {
-      let root = document.createElement('div');
+      const root = document.createElement('div');
       document.body.appendChild(root);
 
-      let picker: TypedBaseExtendedPicker = ReactDOM.render(
+      const picker: TypedBaseExtendedPicker = ReactDOM.render(
         <BaseExtendedPickerWithType
           floatingPickerProps={ floatingPickerProps }
           selectedItemsListProps={ selectedItemsListProps }
@@ -118,10 +118,10 @@ describe('Pickers', () => {
     });
 
     it('Can hide and show picker', () => {
-      let root = document.createElement('div');
+      const root = document.createElement('div');
       document.body.appendChild(root);
 
-      let picker: TypedBaseExtendedPicker = ReactDOM.render(
+      const picker: TypedBaseExtendedPicker = ReactDOM.render(
         <BaseExtendedPickerWithType
           floatingPickerProps={ floatingPickerProps }
           selectedItemsListProps={ selectedItemsListProps }
@@ -145,10 +145,10 @@ describe('Pickers', () => {
     });
 
     it('Completes the suggestion', () => {
-      let root = document.createElement('div');
+      const root = document.createElement('div');
       document.body.appendChild(root);
 
-      let picker: TypedBaseExtendedPicker = ReactDOM.render(
+      const picker: TypedBaseExtendedPicker = ReactDOM.render(
         <BaseExtendedPickerWithType
           floatingPickerProps={ floatingPickerProps }
           selectedItemsListProps={ selectedItemsListProps }
@@ -170,4 +170,4 @@ describe('Pickers', () => {
       ReactDOM.unmountComponentAtNode(root);
     });
   });
-});
+});
\ No newline at end of file
diff --git a/packages/experiments/src/components/ExtendedPicker/BaseExtendedPicker.tsx b/packages/experiments/src/components/ExtendedPicker/BaseExtendedPicker.tsx
index 46c0d32958d709..bd88502c5f8b6a 100644
--- a/packages/experiments/src/components/ExtendedPicker/BaseExtendedPicker.tsx
+++ b/packages/experiments/src/components/ExtendedPicker/BaseExtendedPicker.tsx
@@ -46,7 +46,7 @@ export class BaseExtendedPicker<T, P extends IBaseExtendedPickerProps<T>> extend
   constructor(basePickerProps: P) {
     super(basePickerProps);
 
-    let items: T[] = basePickerProps.selectedItems || basePickerProps.defaultSelectedItems || [];
+    const items: T[] = basePickerProps.selectedItems || basePickerProps.defaultSelectedItems || [];
 
     this.selection = new Selection({ onSelectionChanged: () => this.onSelectionChange() });
     this.selection.setItems(items);
@@ -86,8 +86,8 @@ export class BaseExtendedPicker<T, P extends IBaseExtendedPickerProps<T>> extend
   }
 
   public render(): JSX.Element {
-    let { suggestedDisplayValue } = this.state;
-    let {
+    const { suggestedDisplayValue } = this.state;
+    const {
       className,
       inputProps,
       disabled
@@ -148,7 +148,7 @@ export class BaseExtendedPicker<T, P extends IBaseExtendedPickerProps<T>> extend
   }
 
   protected renderSuggestions(): JSX.Element {
-    let onRenderFloatingPicker = this.props.onRenderFloatingPicker;
+    const onRenderFloatingPicker = this.props.onRenderFloatingPicker;
     return (onRenderFloatingPicker({
       componentRef: this.floatingPicker,
       onChange: this._onSuggestionSelected,
@@ -159,7 +159,7 @@ export class BaseExtendedPicker<T, P extends IBaseExtendedPickerProps<T>> extend
   }
 
   protected renderSelectedItemsList(): JSX.Element {
-    let onRenderSelectedItems = this.props.onRenderSelectedItems;
+    const onRenderSelectedItems = this.props.onRenderSelectedItems;
     return (onRenderSelectedItems({
       componentRef: this.selectedItemsList,
       ...this.selectedItemsListProps
@@ -167,10 +167,10 @@ export class BaseExtendedPicker<T, P extends IBaseExtendedPickerProps<T>> extend
   }
 
   protected resetFocus(index?: number): void {
-    let { items } = this.state;
+    const { items } = this.state;
 
     if (items.length && index! >= 0 && this.root.value) {
-      let newEl: HTMLElement = this.root.value
+      const newEl: HTMLElement = this.root.value
         .querySelectorAll('[data-selection-index]')[Math.min(index!, items.length - 1)] as HTMLElement;
       if (newEl && this.focusZone.value) {
         this.focusZone.value.focusElement(newEl);
@@ -228,7 +228,7 @@ export class BaseExtendedPicker<T, P extends IBaseExtendedPickerProps<T>> extend
 
   protected onPaste = (ev: React.ClipboardEvent<Autofill | HTMLInputElement>): void => {
     if (this.props.onPaste) {
-      let inputText = ev.clipboardData.getData('Text');
+      const inputText = ev.clipboardData.getData('Text');
       ev.preventDefault();
       this.props.onPaste(inputText);
     }
diff --git a/packages/experiments/src/components/ExtendedPicker/examples/ExtendedPeoplePicker.Basic.Example.tsx b/packages/experiments/src/components/ExtendedPicker/examples/ExtendedPeoplePicker.Basic.Example.tsx
index fcd82c94a542f5..5b2dfc1ab7f78d 100644
--- a/packages/experiments/src/components/ExtendedPicker/examples/ExtendedPeoplePicker.Basic.Example.tsx
+++ b/packages/experiments/src/components/ExtendedPicker/examples/ExtendedPeoplePicker.Basic.Example.tsx
@@ -33,9 +33,9 @@ export class ExtendedPeoplePickerTypesExample extends BaseComponent<{}, IPeopleP
 
   constructor(props: {}) {
     super(props);
-    let peopleList: IPersonaWithMenu[] = [];
+    const peopleList: IPersonaWithMenu[] = [];
     people.forEach((persona: IPersonaProps) => {
-      let target: IPersonaWithMenu = {};
+      const target: IPersonaWithMenu = {};
 
       assign(target, persona);
       peopleList.push(target);
@@ -190,17 +190,18 @@ export class ExtendedPeoplePickerTypesExample extends BaseComponent<{}, IPeopleP
   }
 
   private _onRemoveSuggestion = (item: IPersonaProps): void => {
-    let { peopleList, mostRecentlyUsed: mruState } = this.state;
-    let indexPeopleList: number = peopleList.indexOf(item);
-    let indexMostRecentlyUsed: number = mruState.indexOf(item);
+    const { peopleList, mostRecentlyUsed: mruState } = this.state;
+    const indexPeopleList: number = peopleList.indexOf(item);
+    const indexMostRecentlyUsed: number = mruState.indexOf(item);
 
     if (indexPeopleList >= 0) {
-      let newPeople: IPersonaProps[] = peopleList.slice(0, indexPeopleList).concat(peopleList.slice(indexPeopleList + 1));
+      const newPeople: IPersonaProps[] = peopleList.slice(0, indexPeopleList).concat(peopleList.slice(indexPeopleList + 1));
       this.setState({ peopleList: newPeople });
     }
 
     if (indexMostRecentlyUsed >= 0) {
-      let newSuggestedPeople: IPersonaProps[] = mruState.slice(0, indexMostRecentlyUsed).concat(mruState.slice(indexMostRecentlyUsed + 1));
+      const newSuggestedPeople: IPersonaProps[]
+        = mruState.slice(0, indexMostRecentlyUsed).concat(mruState.slice(indexMostRecentlyUsed + 1));
       this.setState({ mostRecentlyUsed: newSuggestedPeople });
     }
   }
@@ -303,4 +304,4 @@ export class ExtendedPeoplePickerTypesExample extends BaseComponent<{}, IPeopleP
         return [];
     }
   }
-}
+}
\ No newline at end of file
diff --git a/packages/experiments/src/components/FloatingPicker/BaseFloatingPicker.test.tsx b/packages/experiments/src/components/FloatingPicker/BaseFloatingPicker.test.tsx
index 252a302b2cd10c..4e651d5efc247b 100644
--- a/packages/experiments/src/components/FloatingPicker/BaseFloatingPicker.test.tsx
+++ b/packages/experiments/src/components/FloatingPicker/BaseFloatingPicker.test.tsx
@@ -60,17 +60,17 @@ describe('Pickers', () => {
           suggestionsStore={ new SuggestionsStore<ISimple>() }
         />
       );
-      let tree = component.toJSON();
+      const tree = component.toJSON();
       expect(tree).toMatchSnapshot();
     });
 
     it('shows zero query options on empty input', () => {
-      let root = document.createElement('div');
-      let input = document.createElement('input');
+      const root = document.createElement('div');
+      const input = document.createElement('input');
       document.body.appendChild(input);
       document.body.appendChild(root);
 
-      let picker: TypedBaseFloatingPicker = ReactDOM.render(
+      const picker: TypedBaseFloatingPicker = ReactDOM.render(
         <BaseFloatingPickerWithType
           onResolveSuggestions={ onResolveSuggestions }
           onRenderSuggestionsItem={ basicSuggestionRenderer }
@@ -92,12 +92,12 @@ describe('Pickers', () => {
     });
 
     it('updates suggestions on query string changed', () => {
-      let root = document.createElement('div');
-      let input = document.createElement('input');
+      const root = document.createElement('div');
+      const input = document.createElement('input');
       document.body.appendChild(input);
       document.body.appendChild(root);
 
-      let picker: TypedBaseFloatingPicker = ReactDOM.render(
+      const picker: TypedBaseFloatingPicker = ReactDOM.render(
         <BaseFloatingPickerWithType
           onResolveSuggestions={ onResolveSuggestions }
           onRenderSuggestionsItem={ basicSuggestionRenderer }
@@ -114,4 +114,4 @@ describe('Pickers', () => {
       ReactDOM.unmountComponentAtNode(root);
     });
   });
-});
+});
\ No newline at end of file
diff --git a/packages/experiments/src/components/FloatingPicker/BaseFloatingPicker.tsx b/packages/experiments/src/components/FloatingPicker/BaseFloatingPicker.tsx
index b0d7c7fa9a08f3..05217da65bccf7 100644
--- a/packages/experiments/src/components/FloatingPicker/BaseFloatingPicker.tsx
+++ b/packages/experiments/src/components/FloatingPicker/BaseFloatingPicker.tsx
@@ -21,7 +21,6 @@ export interface IBaseFloatingPickerState {
   queryString: string;
   suggestedDisplayValue?: string;
   moreSuggestionsAvailable?: boolean;
-  isSearching?: boolean;
   isMostRecentlyUsedVisible?: boolean;
   suggestionsVisible?: boolean;
   suggestionsLoading?: boolean;
@@ -51,7 +50,6 @@ export class BaseFloatingPicker<T, P extends IBaseFloatingPickerProps<T>> extend
       suggestedDisplayValue: '',
       isMostRecentlyUsedVisible: false,
       moreSuggestionsAvailable: false,
-      isSearching: false,
       didBind: false,
     };
   }
@@ -157,7 +155,7 @@ export class BaseFloatingPicker<T, P extends IBaseFloatingPickerProps<T>> extend
   }
 
   public render(): JSX.Element {
-    let { className } = this.props;
+    const { className } = this.props;
     return (
       <div
         ref={ this.root }
@@ -169,7 +167,7 @@ export class BaseFloatingPicker<T, P extends IBaseFloatingPickerProps<T>> extend
   }
 
   protected renderSuggestions(): JSX.Element | null {
-    let TypedSuggestionsControl = this.SuggestionsControlOfProperType;
+    const TypedSuggestionsControl = this.SuggestionsControlOfProperType;
     return this.state.suggestionsVisible ? (
       <Callout
         className={ styles.callout }
@@ -193,7 +191,6 @@ export class BaseFloatingPicker<T, P extends IBaseFloatingPickerProps<T>> extend
           onSuggestionRemove={ this.onSuggestionRemove }
           suggestions={ this.suggestionStore.getSuggestions() }
           ref={ this._resolveRef('suggestionsControl') }
-          isSearching={ this.state.isSearching }
           completeSuggestion={ this.completeSuggestion }
           shouldLoopSelection={ false }
           { ...this.props.pickerSuggestionsProps as IBaseFloatingPickerSuggestionProps }
@@ -204,8 +201,8 @@ export class BaseFloatingPicker<T, P extends IBaseFloatingPickerProps<T>> extend
 
   protected onSuggestionSelect(): void {
     if (this.suggestionsControl && this.suggestionsControl.currentSuggestion) {
-      let currentValue: string = this.state.queryString;
-      let itemValue: string = this._getTextFromItem(
+      const currentValue: string = this.state.queryString;
+      const itemValue: string = this._getTextFromItem(
         this.suggestionsControl.currentSuggestion.item,
         currentValue
       );
@@ -227,8 +224,8 @@ export class BaseFloatingPicker<T, P extends IBaseFloatingPickerProps<T>> extend
 
   protected updateSuggestionWithZeroState(): void {
     if (this.props.onZeroQuerySuggestion) {
-      let onEmptyInputFocus = this.props.onZeroQuerySuggestion as (selectedItems?: T[]) => T[] | PromiseLike<T[]>;
-      let suggestions: T[] | PromiseLike<T[]> = onEmptyInputFocus(this.props.selectedItems);
+      const onEmptyInputFocus = this.props.onZeroQuerySuggestion as (selectedItems?: T[]) => T[] | PromiseLike<T[]>;
+      const suggestions: T[] | PromiseLike<T[]> = onEmptyInputFocus(this.props.selectedItems);
       this.updateSuggestionsList(suggestions);
     } else {
       this.hidePicker();
@@ -239,8 +236,8 @@ export class BaseFloatingPicker<T, P extends IBaseFloatingPickerProps<T>> extend
     suggestions: T[] | PromiseLike<T[]>,
     updatedValue?: string
   ): void {
-    let suggestionsArray: T[] = suggestions as T[];
-    let suggestionsPromiseLike: PromiseLike<T[]> = suggestions as PromiseLike<
+    const suggestionsArray: T[] = suggestions as T[];
+    const suggestionsPromiseLike: PromiseLike<T[]> = suggestions as PromiseLike<
       T[]
       >;
 
@@ -260,7 +257,7 @@ export class BaseFloatingPicker<T, P extends IBaseFloatingPickerProps<T>> extend
       this._updateSuggestionsVisible(updatedValue !== undefined && updatedValue !== '');
 
       // Ensure that the promise will only use the callback if it was the most recent one.
-      let promise: PromiseLike<
+      const promise: PromiseLike<
         T[]
         > = (this.currentPromise = suggestionsPromiseLike);
       promise.then((newSuggestions: T[]) => {
@@ -334,7 +331,7 @@ export class BaseFloatingPicker<T, P extends IBaseFloatingPickerProps<T>> extend
         !(this.props.inputElement as HTMLElement).contains(ev.target as HTMLElement))) {
       return;
     }
-    let keyCode = ev.which;
+    const keyCode = ev.which;
     switch (keyCode) {
       case KeyCodes.escape:
         this.hidePicker();
@@ -386,7 +383,7 @@ export class BaseFloatingPicker<T, P extends IBaseFloatingPickerProps<T>> extend
   }
 
   private _onResolveSuggestions(updatedValue: string): void {
-    let suggestions: T[] | PromiseLike<T[]> | null = this.props.onResolveSuggestions(updatedValue, this.props.selectedItems);
+    const suggestions: T[] | PromiseLike<T[]> | null = this.props.onResolveSuggestions(updatedValue, this.props.selectedItems);
 
     if (suggestions !== null) {
       this.updateSuggestionsList(suggestions, updatedValue);
@@ -398,14 +395,14 @@ export class BaseFloatingPicker<T, P extends IBaseFloatingPickerProps<T>> extend
       this.props.onValidateInput &&
       this.props.createGenericItem
     ) {
-      let itemToConvert: ISuggestionModel<T> = (this.props.createGenericItem as ((
+      const itemToConvert: ISuggestionModel<T> = (this.props.createGenericItem as ((
         input: string,
         isValid: boolean
       ) => ISuggestionModel<T>))(
         this.state.queryString,
         (this.props.onValidateInput as ((input: string) => boolean))(this.state.queryString)
         );
-      let convertedItems = this.suggestionStore.convertSuggestionsToSuggestionItems([itemToConvert]);
+      const convertedItems = this.suggestionStore.convertSuggestionsToSuggestionItems([itemToConvert]);
       this.onChange(convertedItems[0].item);
     }
   }
@@ -439,4 +436,4 @@ export class BaseFloatingPicker<T, P extends IBaseFloatingPickerProps<T>> extend
       this.setState({ didBind: false });
     }
   }
-}
+}
\ No newline at end of file
diff --git a/packages/experiments/src/components/FloatingPicker/PeoplePicker/FloatingPeoplePicker.tsx b/packages/experiments/src/components/FloatingPicker/PeoplePicker/FloatingPeoplePicker.tsx
index de027adbf47909..a2a787f36ca134 100644
--- a/packages/experiments/src/components/FloatingPicker/PeoplePicker/FloatingPeoplePicker.tsx
+++ b/packages/experiments/src/components/FloatingPicker/PeoplePicker/FloatingPeoplePicker.tsx
@@ -23,7 +23,7 @@ export class FloatingPeoplePicker extends BaseFloatingPeoplePicker {
 
 export function createGenericItem(name: string, isValid: boolean): ISuggestionModel<IPersonaProps> {
   // tslint:disable-next-line:no-any
-  let personaToConvert: any = {
+  const personaToConvert: any = {
     key: name,
     primaryText: name,
     imageInitials: '!',
diff --git a/packages/experiments/src/components/FloatingPicker/PeoplePicker/PeoplePickerItems/SelectedItemDefault.tsx b/packages/experiments/src/components/FloatingPicker/PeoplePicker/PeoplePickerItems/SelectedItemDefault.tsx
index 1799e953076adc..387f22c10d0638 100644
--- a/packages/experiments/src/components/FloatingPicker/PeoplePicker/PeoplePickerItems/SelectedItemDefault.tsx
+++ b/packages/experiments/src/components/FloatingPicker/PeoplePicker/PeoplePickerItems/SelectedItemDefault.tsx
@@ -10,7 +10,7 @@ import * as stylesImport from './PickerItemsDefault.scss';
 const styles: any = stylesImport;
 
 export const SelectedItemDefault: (props: IPeoplePickerItemProps) => JSX.Element = (peoplePickerItemProps: IPeoplePickerItemProps) => {
-  let {
+  const {
     item,
     onRemoveItem,
     index,
@@ -59,4 +59,4 @@ export const SelectedItemDefault: (props: IPeoplePickerItemProps) => JSX.Element
       />
     </div >
   );
-};
+};
\ No newline at end of file
diff --git a/packages/experiments/src/components/FloatingPicker/PeoplePicker/examples/FloatingPeoplePicker.Basic.Example.tsx b/packages/experiments/src/components/FloatingPicker/PeoplePicker/examples/FloatingPeoplePicker.Basic.Example.tsx
index e8e9760c189162..60053903e075e7 100644
--- a/packages/experiments/src/components/FloatingPicker/PeoplePicker/examples/FloatingPeoplePicker.Basic.Example.tsx
+++ b/packages/experiments/src/components/FloatingPicker/PeoplePicker/examples/FloatingPeoplePicker.Basic.Example.tsx
@@ -28,9 +28,9 @@ export class FloatingPeoplePickerTypesExample extends BaseComponent<{}, IPeopleP
 
   constructor(props: {}) {
     super(props);
-    let peopleList: IPersonaWithMenu[] = [];
+    const peopleList: IPersonaWithMenu[] = [];
     people.forEach((persona: IPersonaProps) => {
-      let target: IPersonaWithMenu = {};
+      const target: IPersonaWithMenu = {};
 
       assign(target, persona);
       peopleList.push(target);
@@ -73,7 +73,7 @@ export class FloatingPeoplePickerTypesExample extends BaseComponent<{}, IPeopleP
   }
 
   private _renderFloatingPicker(): JSX.Element {
-    let suggestionProps: IBaseFloatingPickerSuggestionProps = {
+    const suggestionProps: IBaseFloatingPickerSuggestionProps = {
       footerItemsProps: [{
         renderItem: () => { return (<div>Showing { this._picker.suggestions.length } results</div>); },
         shouldShow: () => {
@@ -116,17 +116,18 @@ export class FloatingPeoplePickerTypesExample extends BaseComponent<{}, IPeopleP
   }
 
   private _onRemoveSuggestion = (item: IPersonaProps): void => {
-    let { peopleList, mostRecentlyUsed: mruState } = this.state;
-    let indexPeopleList: number = peopleList.indexOf(item);
-    let indexMostRecentlyUsed: number = mruState.indexOf(item);
+    const { peopleList, mostRecentlyUsed: mruState } = this.state;
+    const indexPeopleList: number = peopleList.indexOf(item);
+    const indexMostRecentlyUsed: number = mruState.indexOf(item);
 
     if (indexPeopleList >= 0) {
-      let newPeople: IPersonaProps[] = peopleList.slice(0, indexPeopleList).concat(peopleList.slice(indexPeopleList + 1));
+      const newPeople: IPersonaProps[] = peopleList.slice(0, indexPeopleList).concat(peopleList.slice(indexPeopleList + 1));
       this.setState({ peopleList: newPeople });
     }
 
     if (indexMostRecentlyUsed >= 0) {
-      let newSuggestedPeople: IPersonaProps[] = mruState.slice(0, indexMostRecentlyUsed).concat(mruState.slice(indexMostRecentlyUsed + 1));
+      const newSuggestedPeople: IPersonaProps[]
+        = mruState.slice(0, indexMostRecentlyUsed).concat(mruState.slice(indexMostRecentlyUsed + 1));
       this.setState({ mostRecentlyUsed: newSuggestedPeople });
     }
   }
@@ -175,4 +176,4 @@ export class FloatingPeoplePickerTypesExample extends BaseComponent<{}, IPeopleP
       return false;
     }
   }
-}
+}
\ No newline at end of file
diff --git a/packages/experiments/src/components/FloatingPicker/Suggestions/Suggestions.tsx b/packages/experiments/src/components/FloatingPicker/Suggestions/Suggestions.tsx
index b06b1bbd493c2c..072957192b09c5 100644
--- a/packages/experiments/src/components/FloatingPicker/Suggestions/Suggestions.tsx
+++ b/packages/experiments/src/components/FloatingPicker/Suggestions/Suggestions.tsx
@@ -29,7 +29,7 @@ export class Suggestions<T> extends BaseComponent<ISuggestionsProps<T>, {}> {
    * Increments the selected suggestion index
    */
   public nextSuggestion(): boolean {
-    let { suggestions } = this.props;
+    const { suggestions } = this.props;
 
     if (suggestions && suggestions.length > 0) {
       if (this.currentIndex === -1) {
@@ -51,7 +51,7 @@ export class Suggestions<T> extends BaseComponent<ISuggestionsProps<T>, {}> {
    * Decrements the selected suggestion index
    */
   public previousSuggestion(): boolean {
-    let { suggestions } = this.props;
+    const { suggestions } = this.props;
 
     if (suggestions && suggestions.length > 0) {
       if (this.currentIndex === -1) {
@@ -94,7 +94,7 @@ export class Suggestions<T> extends BaseComponent<ISuggestionsProps<T>, {}> {
   }
 
   public setSelectedSuggestion(index: number): void {
-    let { suggestions } = this.props;
+    const { suggestions } = this.props;
 
     if (index > suggestions.length - 1 || index < 0) {
       this.currentIndex = 0;
diff --git a/packages/experiments/src/components/FloatingPicker/Suggestions/Suggestions.types.ts b/packages/experiments/src/components/FloatingPicker/Suggestions/Suggestions.types.ts
index 6601e8147b9b06..b8e642cae14a2f 100644
--- a/packages/experiments/src/components/FloatingPicker/Suggestions/Suggestions.types.ts
+++ b/packages/experiments/src/components/FloatingPicker/Suggestions/Suggestions.types.ts
@@ -1,6 +1,5 @@
 import * as React from 'react';
 import { ISuggestionModel } from 'office-ui-fabric-react/lib/Pickers';
-import { IRenderFunction } from '../../../Utilities';
 import { IPersonaProps } from 'office-ui-fabric-react/lib/Persona';
 
 // tslint:disable-next-line:no-any
@@ -75,10 +74,6 @@ export interface ISuggestionsControlProps<T> extends React.Props<any>, ISuggesti
    * Whether or not the first selectable item in the suggestions list should be selected
    */
   shouldSelectFirstItem?: () => boolean;
-  /**
-  * How the "no result found" should look in the suggestion list.
-  */
-  onRenderNoResultFound?: IRenderFunction<void>;
   /**
    * The callback that should be called when the user attempts to use the input text as as item
    */
@@ -87,22 +82,6 @@ export interface ISuggestionsControlProps<T> extends React.Props<any>, ISuggesti
    * The CSS classname of the suggestions list.
    */
   className?: string;
-  /**
-   * Used to indicate whether or not the component is searching for more results.
-   */
-  isSearching?: boolean;
-  /**
-   * The text to display while searching for more results in a limited sugesstions list.
-   */
-  searchingText?: string;
-  /**
-   * A renderer that adds an element at the end of the suggestions list it has more items than resultsMaximumNumber.
-   */
-  resultsFooterFull?: (props: ISuggestionsProps<T>) => JSX.Element;
-  /**
-   * A renderer that adds an element at the end of the suggestions list it has fewer items than resultsMaximumNumber.
-   */
-  resultsFooter?: (props: ISuggestionsProps<T>) => JSX.Element;
   /**
    * Completes the suggestion
    */
diff --git a/packages/experiments/src/components/FloatingPicker/Suggestions/SuggestionsControl.tsx b/packages/experiments/src/components/FloatingPicker/Suggestions/SuggestionsControl.tsx
index b1cb55ae86dad8..260b1ea130c5e8 100644
--- a/packages/experiments/src/components/FloatingPicker/Suggestions/SuggestionsControl.tsx
+++ b/packages/experiments/src/components/FloatingPicker/Suggestions/SuggestionsControl.tsx
@@ -5,7 +5,6 @@ import {
   KeyCodes
 } from '../../../Utilities';
 import { IButton } from 'office-ui-fabric-react/lib/Button';
-import { Spinner } from 'office-ui-fabric-react/lib/Spinner';
 import { ISuggestionModel } from 'office-ui-fabric-react/lib/Pickers';
 import {
   ISuggestionsHeaderFooterItemProps,
@@ -110,8 +109,6 @@ export class SuggestionsControl<T> extends BaseComponent<ISuggestionsControlProp
   public render(): JSX.Element {
     const {
       className,
-      isSearching,
-      searchingText,
       headerItemsProps,
       footerItemsProps
     } = this.props;
@@ -126,12 +123,6 @@ export class SuggestionsControl<T> extends BaseComponent<ISuggestionsControlProp
         { headerItemsProps && this.renderHeaderItems() }
         { this._renderSuggestions() }
         { footerItemsProps && this.renderFooterItems() }
-        { isSearching ?
-          (<Spinner
-            className={ css('ms-Suggestions-spinner', styles.suggestionsSpinner) }
-            label={ searchingText }
-          />) : (null)
-        }
       </div>
     );
   }
@@ -145,23 +136,23 @@ export class SuggestionsControl<T> extends BaseComponent<ISuggestionsControlProp
   }
 
   public hasSelection(): boolean {
-    let { selectedHeaderIndex, selectedFooterIndex } = this.state;
+    const { selectedHeaderIndex, selectedFooterIndex } = this.state;
     return selectedHeaderIndex !== -1 || this.hasSuggestionSelected() || selectedFooterIndex !== -1;
   }
 
   public executeSelectedAction(): void {
-    let { headerItemsProps, footerItemsProps } = this.props;
-    let { selectedHeaderIndex, selectedFooterIndex } = this.state;
+    const { headerItemsProps, footerItemsProps } = this.props;
+    const { selectedHeaderIndex, selectedFooterIndex } = this.state;
 
     if (headerItemsProps && selectedHeaderIndex !== -1 && selectedHeaderIndex < headerItemsProps.length) {
-      let selectedHeaderItem = headerItemsProps[selectedHeaderIndex];
+      const selectedHeaderItem = headerItemsProps[selectedHeaderIndex];
       if (selectedHeaderItem.onExecute) {
         selectedHeaderItem.onExecute();
       }
     } else if (this._suggestions.hasSuggestionSelected()) {
       this.props.completeSuggestion();
     } else if (footerItemsProps && selectedFooterIndex !== -1 && selectedFooterIndex < footerItemsProps.length) {
-      let selectedFooterItem = footerItemsProps[selectedFooterIndex];
+      const selectedFooterItem = footerItemsProps[selectedFooterIndex];
       if (selectedFooterItem.onExecute) {
         selectedFooterItem.onExecute();
       }
@@ -177,7 +168,7 @@ export class SuggestionsControl<T> extends BaseComponent<ISuggestionsControlProp
    * @param keyCode The keyCode to handle
    */
   public handleKeyDown(keyCode: number): boolean {
-    let { selectedHeaderIndex, selectedFooterIndex } = this.state;
+    const { selectedHeaderIndex, selectedFooterIndex } = this.state;
     let isKeyDownHandled = false;
     if (keyCode === KeyCodes.down) {
       if (selectedHeaderIndex === -1 && !this._suggestions.hasSuggestionSelected() && selectedFooterIndex === -1) {
@@ -235,7 +226,7 @@ export class SuggestionsControl<T> extends BaseComponent<ISuggestionsControlProp
         aria-label={ suggestionsHeaderContainerAriaLabel }
       >
         { headerItemsProps.map((headerItemProps: ISuggestionsHeaderFooterProps, index: number) => {
-          let isSelected = selectedHeaderIndex !== -1 && selectedHeaderIndex === index;
+          const isSelected = selectedHeaderIndex !== -1 && selectedHeaderIndex === index;
           return (
             headerItemProps.shouldShow() ? <div
               ref={ this._resolveRef(isSelected ? '_selectedElement' : '') }
@@ -258,7 +249,7 @@ export class SuggestionsControl<T> extends BaseComponent<ISuggestionsControlProp
 
   protected renderFooterItems(): JSX.Element | null {
     const { footerItemsProps, suggestionsFooterContainerAriaLabel } = this.props;
-    let { selectedFooterIndex } = this.state;
+    const { selectedFooterIndex } = this.state;
     return footerItemsProps ? (
       <div
         className={ css('ms-Suggestions-footerContainer', styles.suggestionsContainer) }
@@ -267,7 +258,7 @@ export class SuggestionsControl<T> extends BaseComponent<ISuggestionsControlProp
         aria-label={ suggestionsFooterContainerAriaLabel }
       >
         { footerItemsProps.map((footerItemProps: ISuggestionsHeaderFooterProps, index: number) => {
-          let isSelected = selectedFooterIndex !== -1 && selectedFooterIndex === index;
+          const isSelected = selectedFooterIndex !== -1 && selectedFooterIndex === index;
           return (
             footerItemProps.shouldShow() ? <div
               ref={ this._resolveRef(isSelected ? '_selectedElement' : '') }
@@ -310,11 +301,11 @@ export class SuggestionsControl<T> extends BaseComponent<ISuggestionsControlProp
       return;
     }
 
-    let startedItemType = originalItemType !== undefined ? originalItemType : itemType;
+    const startedItemType = originalItemType !== undefined ? originalItemType : itemType;
 
     // Try to set the selection to the next selectable item, of the same suggestion item type group
     // If this is the original item type, use the current index
-    let selectionChanged = this._selectNextItemOfItemType(
+    const selectionChanged = this._selectNextItemOfItemType(
       itemType,
       startedItemType === itemType ? this._getCurrentIndexForType(itemType) : undefined);
 
@@ -337,10 +328,10 @@ export class SuggestionsControl<T> extends BaseComponent<ISuggestionsControlProp
       return;
     }
 
-    let startedItemType = originalItemType !== undefined ? originalItemType : itemType;
+    const startedItemType = originalItemType !== undefined ? originalItemType : itemType;
 
     // Try to set the selection to the previous selectable item, of the same suggestion item type group
-    let selectionChanged = this._selectPreviousItemOfItemType(
+    const selectionChanged = this._selectPreviousItemOfItemType(
       itemType,
       startedItemType === itemType ? this._getCurrentIndexForType(itemType) : undefined);
 
@@ -408,12 +399,12 @@ export class SuggestionsControl<T> extends BaseComponent<ISuggestionsControlProp
         return true;
       }
     } else {
-      let isHeader = itemType === SuggestionItemType.header;
-      let itemProps = isHeader ? this.props.headerItemsProps : this.props.footerItemsProps;
+      const isHeader = itemType === SuggestionItemType.header;
+      const itemProps = isHeader ? this.props.headerItemsProps : this.props.footerItemsProps;
 
       if (itemProps && itemProps.length > currentIndex + 1) {
         for (let i = currentIndex + 1; i < itemProps.length; i++) {
-          let item = itemProps[i];
+          const item = itemProps[i];
           if (item.onExecute && item.shouldShow()) {
             this.setState({ selectedHeaderIndex: isHeader ? i : -1 });
             this.setState({ selectedFooterIndex: isHeader ? -1 : i });
@@ -435,20 +426,20 @@ export class SuggestionsControl<T> extends BaseComponent<ISuggestionsControlProp
  */
   private _selectPreviousItemOfItemType(itemType: SuggestionItemType, currentIndex?: number): boolean {
     if (itemType === SuggestionItemType.suggestion) {
-      let index = currentIndex !== undefined ? currentIndex : this.props.suggestions.length;
+      const index = currentIndex !== undefined ? currentIndex : this.props.suggestions.length;
       if (index > 0) {
         this._suggestions.setSelectedSuggestion(index - 1);
         this.setState({ selectedHeaderIndex: -1, selectedFooterIndex: -1 });
         return true;
       }
     } else {
-      let isHeader = itemType === SuggestionItemType.header;
-      let itemProps = isHeader ? this.props.headerItemsProps : this.props.footerItemsProps;
+      const isHeader = itemType === SuggestionItemType.header;
+      const itemProps = isHeader ? this.props.headerItemsProps : this.props.footerItemsProps;
       if (itemProps) {
-        let index = currentIndex !== undefined ? currentIndex : itemProps.length;
+        const index = currentIndex !== undefined ? currentIndex : itemProps.length;
         if (index > 0) {
           for (let i = index - 1; i >= 0; i--) {
-            let item = itemProps[i];
+            const item = itemProps[i];
             if (item.onExecute && item.shouldShow()) {
               this.setState({ selectedHeaderIndex: isHeader ? i : -1 });
               this.setState({ selectedFooterIndex: isHeader ? -1 : i });
diff --git a/packages/experiments/src/components/SelectedItemsList/BaseSelectedItemsList.test.tsx b/packages/experiments/src/components/SelectedItemsList/BaseSelectedItemsList.test.tsx
index f725e47c0a0097..40790c614dd6bc 100644
--- a/packages/experiments/src/components/SelectedItemsList/BaseSelectedItemsList.test.tsx
+++ b/packages/experiments/src/components/SelectedItemsList/BaseSelectedItemsList.test.tsx
@@ -28,7 +28,7 @@ describe('SelectedItemsList', () => {
         <BaseSelectedItemsListWithType
         />
       );
-      let tree = component.toJSON();
+      const tree = component.toJSON();
       expect(tree).toMatchSnapshot();
     });
 
@@ -62,7 +62,7 @@ describe('SelectedItemsList', () => {
         root
       ) as TypedBaseSelectedItemsList;
 
-      let items: ISimple[] = [{ key: '1', name: 'a' }, { key: '2', name: 'b' }];
+      const items: ISimple[] = [{ key: '1', name: 'a' }, { key: '2', name: 'b' }];
       itemsList.addItems(items);
 
       expect(itemsList.items.length).toEqual(2);
diff --git a/packages/experiments/src/components/SelectedItemsList/BaseSelectedItemsList.tsx b/packages/experiments/src/components/SelectedItemsList/BaseSelectedItemsList.tsx
index f3116a45f136e0..a24a6f1549228a 100644
--- a/packages/experiments/src/components/SelectedItemsList/BaseSelectedItemsList.tsx
+++ b/packages/experiments/src/components/SelectedItemsList/BaseSelectedItemsList.tsx
@@ -28,7 +28,7 @@ export class BaseSelectedItemsList<T, P extends IBaseSelectedItemsListProps<T>>
   constructor(basePickerProps: P) {
     super(basePickerProps);
 
-    let items: T[] = basePickerProps.selectedItems || basePickerProps.defaultSelectedItems || [];
+    const items: T[] = basePickerProps.selectedItems || basePickerProps.defaultSelectedItems || [];
     this.state = {
       items: items,
     };
@@ -45,35 +45,35 @@ export class BaseSelectedItemsList<T, P extends IBaseSelectedItemsListProps<T>>
 
   public addItems = (items: T[]): void => {
     // tslint:disable-next-line:no-any
-    let processedItems: T[] | PromiseLike<T[]> = this.props.onItemSelected ? (this.props.onItemSelected as any)(items) : items;
+    const processedItems: T[] | PromiseLike<T[]> = this.props.onItemSelected ? (this.props.onItemSelected as any)(items) : items;
 
-    let processedItemObjects: T[] = processedItems as T[];
-    let processedItemPromiseLikes: PromiseLike<T[]> = processedItems as PromiseLike<T[]>;
+    const processedItemObjects: T[] = processedItems as T[];
+    const processedItemPromiseLikes: PromiseLike<T[]> = processedItems as PromiseLike<T[]>;
 
     if (processedItemPromiseLikes && processedItemPromiseLikes.then) {
       processedItemPromiseLikes.then((resolvedProcessedItems: T[]) => {
-        let newItems: T[] = this.state.items.concat(resolvedProcessedItems);
+        const newItems: T[] = this.state.items.concat(resolvedProcessedItems);
         this.updateItems(newItems);
       });
     } else {
-      let newItems: T[] = this.state.items.concat(processedItemObjects);
+      const newItems: T[] = this.state.items.concat(processedItemObjects);
       this.updateItems(newItems);
     }
     this.setState({ suggestedDisplayValue: '' });
   }
 
   public removeItemAt = (index: number): void => {
-    let { items } = this.state;
+    const { items } = this.state;
     // tslint:disable-next-line:no-any
     if (index > -1) {
-      let newItems = items.slice(0, index).concat(items.slice(index + 1));
+      const newItems = items.slice(0, index).concat(items.slice(index + 1));
       this.updateItems(newItems);
     }
   }
 
   public onCopy = (ev: React.ClipboardEvent<HTMLElement>): void => {
     if (this.props.onCopyItems && this.selection.getSelectedCount() > 0) {
-      let selectedItems: T[] = this.selection.getSelection() as T[];
+      const selectedItems: T[] = this.selection.getSelection() as T[];
       this.copyItems(selectedItems);
     }
   }
@@ -93,7 +93,7 @@ export class BaseSelectedItemsList<T, P extends IBaseSelectedItemsListProps<T>>
   }
 
   public componentWillReceiveProps(newProps: P): void {
-    let newItems = newProps.selectedItems;
+    const newItems = newProps.selectedItems;
 
     if (newItems) {
       this.setState({ items: newProps.selectedItems });
@@ -110,10 +110,10 @@ export class BaseSelectedItemsList<T, P extends IBaseSelectedItemsListProps<T>>
   }
 
   protected renderItems = (): JSX.Element[] => {
-    let { removeButtonAriaLabel } = this.props;
-    let onRenderItem = this.props.onRenderItem as (props: ISelectedItemProps<T>) => JSX.Element;
+    const { removeButtonAriaLabel } = this.props;
+    const onRenderItem = this.props.onRenderItem as (props: ISelectedItemProps<T>) => JSX.Element;
 
-    let { items } = this.state;
+    const { items } = this.state;
     // tslint:disable-next-line:no-any
     return items.map((item: any, index: number) => onRenderItem({
       item,
@@ -150,10 +150,10 @@ export class BaseSelectedItemsList<T, P extends IBaseSelectedItemsListProps<T>>
   }
 
   protected onItemChange = (changedItem: T, index: number): void => {
-    let { items } = this.state;
+    const { items } = this.state;
 
     if (index >= 0) {
-      let newItems: T[] = items;
+      const newItems: T[] = items;
       newItems[index] = changedItem;
 
       this.updateItems(newItems);
@@ -161,22 +161,22 @@ export class BaseSelectedItemsList<T, P extends IBaseSelectedItemsListProps<T>>
   }
 
   protected removeItem = (item: ISelectedItemProps<T>): void => {
-    let { items } = this.state;
-    let index: number = items.indexOf(item);
+    const { items } = this.state;
+    const index: number = items.indexOf(item);
 
     if (index >= 0) {
-      let newItems: T[] = items.slice(0, index).concat(items.slice(index + 1));
+      const newItems: T[] = items.slice(0, index).concat(items.slice(index + 1));
       this.updateItems(newItems);
     }
   }
 
   // tslint:disable-next-line:no-any
   protected removeItems = (itemsToRemove: any[]): void => {
-    let { items } = this.state;
+    const { items } = this.state;
     // tslint:disable-next-line:no-any
-    let newItems: T[] = items.filter((item: any) => itemsToRemove.indexOf(item) === -1);
-    let firstItemToRemove = itemsToRemove[0];
-    let index: number = items.indexOf(firstItemToRemove);
+    const newItems: T[] = items.filter((item: any) => itemsToRemove.indexOf(item) === -1);
+    const firstItemToRemove = itemsToRemove[0];
+    const index: number = items.indexOf(firstItemToRemove);
 
     this.updateItems(newItems, index);
   }
@@ -211,9 +211,9 @@ export class BaseSelectedItemsList<T, P extends IBaseSelectedItemsListProps<T>>
   protected copyItems(items: T[]): void {
     if (this.props.onCopyItems) {
       // tslint:disable-next-line:no-any
-      let copyText = (this.props.onCopyItems as any)(items);
+      const copyText = (this.props.onCopyItems as any)(items);
 
-      let copyInput = document.createElement('input') as HTMLInputElement;
+      const copyInput = document.createElement('input') as HTMLInputElement;
       document.body.appendChild(copyInput);
 
       try {
diff --git a/packages/experiments/src/components/SelectedItemsList/SelectedPeopleList/Items/EditingItem.tsx b/packages/experiments/src/components/SelectedItemsList/SelectedPeopleList/Items/EditingItem.tsx
index 1639da03805bcd..90175d46014b9f 100644
--- a/packages/experiments/src/components/SelectedItemsList/SelectedPeopleList/Items/EditingItem.tsx
+++ b/packages/experiments/src/components/SelectedItemsList/SelectedPeopleList/Items/EditingItem.tsx
@@ -44,8 +44,8 @@ export class EditingItem extends BaseComponent<IEditingSelectedPeopleItemProps,
   }
 
   public componentDidMount(): void {
-    let getEditingItemText = this.props.getEditingItemText as (item: IExtendedPersonaProps) => string;
-    let itemText = getEditingItemText(this.props.item);
+    const getEditingItemText = this.props.getEditingItemText as (item: IExtendedPersonaProps) => string;
+    const itemText = getEditingItemText(this.props.item);
     this._editingFloatingPicker.value && this._editingFloatingPicker.value.onQueryStringChanged(itemText);
     this._editingInput.value = itemText;
     this._editingInput.focus();
@@ -74,7 +74,7 @@ export class EditingItem extends BaseComponent<IEditingSelectedPeopleItemProps,
   }
 
   private _renderEditingSuggestions = (): JSX.Element => {
-    let onRenderFloatingPicker = this._onRenderFloatingPicker;
+    const onRenderFloatingPicker = this._onRenderFloatingPicker;
     return (onRenderFloatingPicker({
       componentRef: this._editingFloatingPicker,
       onChange: this._onSuggestionSelected,
@@ -103,7 +103,7 @@ export class EditingItem extends BaseComponent<IEditingSelectedPeopleItemProps,
   }
 
   private _onInputChange = (ev: React.FormEvent<HTMLElement>): void => {
-    let value: string = (ev.target as HTMLInputElement).value;
+    const value: string = (ev.target as HTMLInputElement).value;
 
     if (value === '') {
       if (this.props.onRemoveItem) {
diff --git a/packages/experiments/src/components/SelectedItemsList/SelectedPeopleList/Items/ExtendedSelectedItem.tsx b/packages/experiments/src/components/SelectedItemsList/SelectedPeopleList/Items/ExtendedSelectedItem.tsx
index 296b6cf76819bc..4352ac823eb938 100644
--- a/packages/experiments/src/components/SelectedItemsList/SelectedPeopleList/Items/ExtendedSelectedItem.tsx
+++ b/packages/experiments/src/components/SelectedItemsList/SelectedPeopleList/Items/ExtendedSelectedItem.tsx
@@ -22,7 +22,7 @@ export class ExtendedSelectedItem extends BaseComponent<ISelectedPeopleItemProps
   }
 
   public render(): JSX.Element {
-    let {
+    const {
       item,
       onExpandItem,
       onRemoveItem,
diff --git a/packages/experiments/src/components/SelectedItemsList/SelectedPeopleList/SelectedPeopleList.tsx b/packages/experiments/src/components/SelectedItemsList/SelectedPeopleList/SelectedPeopleList.tsx
index c667611f15cc22..7311289ef7cbdf 100644
--- a/packages/experiments/src/components/SelectedItemsList/SelectedPeopleList/SelectedPeopleList.tsx
+++ b/packages/experiments/src/components/SelectedItemsList/SelectedPeopleList/SelectedPeopleList.tsx
@@ -49,24 +49,24 @@ export class SelectedPeopleList extends BasePeopleSelectedItemsList {
   };
 
   public replaceItem = (itemToReplace: IExtendedPersonaProps, itemsToReplaceWith: IExtendedPersonaProps[]): void => {
-    let { items } = this.state;
-    let index: number = items.indexOf(itemToReplace);
+    const { items } = this.state;
+    const index: number = items.indexOf(itemToReplace);
     if (index > -1) {
-      let newItems = items.slice(0, index).concat(itemsToReplaceWith).concat(items.slice(index + 1));
+      const newItems = items.slice(0, index).concat(itemsToReplaceWith).concat(items.slice(index + 1));
       this.updateItems(newItems);
     }
   }
 
   protected renderItems = (): JSX.Element[] => {
-    let { items } = this.state;
+    const { items } = this.state;
     // tslint:disable-next-line:no-any
     return items.map((item: any, index: number) => this._renderItem(item, index));
   }
 
   // tslint:disable-next-line:no-any
   private _renderItem(item: any, index: number): JSX.Element {
-    let { removeButtonAriaLabel } = this.props;
-    let props = {
+    const { removeButtonAriaLabel } = this.props;
+    const props = {
       item,
       index,
       key: item.key ? item.key : index,
@@ -90,8 +90,8 @@ export class SelectedPeopleList extends BasePeopleSelectedItemsList {
         />
       );
     } else {
-      let onRenderItem = this.props.onRenderItem as (props: ISelectedPeopleItemProps) => JSX.Element;
-      let renderedItem = onRenderItem(props);
+      const onRenderItem = this.props.onRenderItem as (props: ISelectedPeopleItemProps) => JSX.Element;
+      const renderedItem = onRenderItem(props);
       return (
         props.menuItems.length > 0 ?
           (
@@ -120,7 +120,7 @@ export class SelectedPeopleList extends BasePeopleSelectedItemsList {
 
   // tslint:disable-next-line:no-any
   private _createMenuItems(item: any): IContextualMenuItem[] {
-    let menuItems: IContextualMenuItem[] = [];
+    const menuItems: IContextualMenuItem[] = [];
 
     if (this.props.editMenuItemText && this.props.getEditingItemText) {
       menuItems.push({