Index: wp-admin/css/widgets.css
===================================================================
--- wp-admin/css/widgets.css	(revision 35726)
+++ wp-admin/css/widgets.css	(working copy)
@@ -37,6 +37,62 @@
 	user-select: none;
 }
 
+.widget-title h3:before,
+.widget-title h4:before {
+	-moz-osx-font-smoothing: grayscale;
+	-webkit-font-smoothing: antialiased;
+	-webkit-transition: all 0.2s ease-in-out;
+	background-color: #84d24c;
+	color: #fff;
+	content: "\f147";
+	display: inline-block;
+	filter: alpha(opacity=0);
+	font: normal 26px/1 dashicons;
+	margin: -23px 15px -23px -15px;
+	opacity: 0;
+	overflow: hidden;
+	padding-bottom: 15px;
+	padding-top: 15px;
+	speak: none;
+	text-align: center;
+	transition: all 0.2s ease-in-out;
+	vertical-align: middle;
+	width: 0;
+}
+
+.widget.success .widget-title h3:before,
+.widget.success .widget-title h4:before {
+	filter: alpha(opacity=100);
+	opacity: 1;
+	width: 48px;
+}
+
+.widget.failure .spinner {
+	background: #a00;
+	filter: alpha(opacity=100);
+	float: left;
+	margin-right: 5px;
+	margin-top: 2px;
+	opacity: 1;
+	padding: 3px 3px 1px;
+	visibility: visible;
+}
+
+.widget.failure .spinner:before {
+	-moz-osx-font-smoothing: grayscale;
+	-webkit-font-smoothing: antialiased;
+	color: #fff;
+	content: "\f335";
+	font: normal 20px/1 dashicons;
+	speak: none;
+}
+
+.widget.failure .feedback {
+	float: left;
+	line-height: 28px;
+	margin-right: 10px;
+}
+
 .widgets-holder-wrap .widget-inside {
 	border-top: none;
 	padding: 1px 15px 15px 15px;
Index: wp-admin/js/widgets.js
===================================================================
--- wp-admin/js/widgets.js	(revision 35726)
+++ wp-admin/js/widgets.js	(working copy)
@@ -1,4 +1,4 @@
-/*global ajaxurl, isRtl */
+/*global ajaxurl, isRtl, _wpWidgetSettings */
 var wpWidgets;
 (function($) {
 	var $document = $( document );
@@ -456,6 +456,29 @@
 			if ( order ) {
 				wpWidgets.saveOrder();
 			}
+		})
+		.done( function () {
+			widget.find( '.widget-title' ).trigger( 'click' );
+			widget.addClass( 'success' );
+
+			setTimeout( function() {
+				widget.removeClass( 'success' );
+			}, 1000 );
+		})
+		.fail( function() {
+			var $element = $( '<div class="feedback">' + _wpWidgetSettings.saveFailed + '</div>' );
+
+			widget.find( '.widget-control-actions .alignright' ).append($element);
+			widget.addClass( 'failure' );
+
+			$( '.spinner', widget ).addClass( 'is-active' );
+
+			setTimeout( function() {
+				$( '.spinner', widget ).removeClass( 'is-active' );
+				$element.remove();
+
+				widget.removeClass( 'failure' );
+			}, 1000 );
 		});
 	},
 
Index: wp-admin/widgets.php
===================================================================
--- wp-admin/widgets.php	(revision 35726)
+++ wp-admin/widgets.php	(working copy)
@@ -31,8 +31,13 @@
 } else {
 	wp_enqueue_script('admin-widgets');
 
-	if ( wp_is_mobile() )
+	wp_localize_script( 'admin-widgets', '_wpWidgetSettings', array(
+		'saveFailed' => __( 'Save failed, try again' )
+	) );
+
+	if ( wp_is_mobile() ) {
 		wp_enqueue_script( 'jquery-touch-punch' );
+	}
 }
 
 /**