I don't know how well it works, but when I installed it, it showed a bar called "Ciuve" or something like that. I don't know if that's just an old name for the extension, or if there's some bait-and-switch going on with something that harvests all your data. Unfortunately I've seen the latter happen way too often with other Chrome extensions, so I'm uninstalling it.
Price comparison, reviews and product videos right in your web browser
Automatic Price Comparison & Coupon Notifications! Pricescout automatically checks for lower prices and money-saving coupons while you shop, otherwise it stays hidden
Once you've installed the free Pricescout browser extension on your browser (Chrome, Firefox or Safari), you just shop as you would normally, and Pricescout will help you save money through two primary features: Automatic Price Comparison and Coupon Notifications