I remember hearing about this a while back and I am glad they are expanding, which mean it works. Being an AP manager myself in a Walmart store in Florida, I hope we are last to get it, but ultimately it should be fine as long as the kinks are worked out. From my understanding, the app is used to scan merchandise in the store, and you bag your groceries while you shop. You then bring your phone to a register and scan a QR code and it pulls from the app all of the items you scanned into the terminal. The bagged items are placed on a scale and weighed as they are at any self checkout. You then swipe a credit card or whatever and put the bags back in your cart. I dont see how some would say it takes more time, since with this, you dont have to put all of the items individually on the belt. I was also told that for issues with theft, the app is registered to a user, you only have X number of times you can make mistakes. If you consistently have issues, you will not be able to use the app.