I use this regularly at the local stop & shop -- it's been in place for easily 10 years. You scan your loyalty card (in my case a picture of it on my phone) an

I use this regularly at the local stop & shop -- it's been in place for easily 10 years. You scan your loyalty card (in my case a picture of it on my phone) and it releases a wireless barcode scanner with an android touchscreen phone-like thing in it. Walk around the store, scan things and put them directly in my bags. My favorite part is checking out without scanning anything and getting bemused looks (and occasional challenges) from other customers -- sometimes even from store staff. Definitely saves time in my opinion over any other option. I only need to touch things twice vs 3 or 4 times and the wireless barcode scanner is much more reliable than the cacophony of things yelling at me with the self checkout. Weights don't always match, vision sensors think i'm doing the wrong thing.