Sounds like they have worked out the bugs since I first saw them earlier this year. They weren't scanning very quickly and us customers had no idea how to even use them as they don't look like the normal self check out systems, well at least the ones I saw.

I think the tech could be really good like the Amazon stores without cashiers but I'm not sure if most at first even understand how they work and are hesitant. I knew I was the first time at a Amazon store. It took hours for the receipt to be emailed to me and I had already left the state as I went to my next stop. However it was correct. Should prove to be interesting times ahead...