Nice thing about whole foods - there is person there to help you with the self-checkout (in case something doesn't scan, price isn't right - rare) - but there isn't any scan or check of bags/receipts. It's close, fast, and convenient enough that I just do my shopping every day for most stuff, with a few exceptions like Milk that I might buy a weeks worth of stuff. The Palm Scan Instapay thing is awesome too.