The regular Fresh stores have a scanner and screen on the cart that you can use to track your purchases while shopping, then the cashier could pull up the contents in one go, without scanning scanning at the register. There's also some discounted products for Prime members that can be applied by pulling up your account on your phone and displaying a barcode.
I went there the first week they opened, and the whole store was a mess with shoppers standing still or walking slowly, completely unaware of their surrounds, while messing with the phone or their cart trying to figure it out.
I'm sure that with enough time, shoppers could figure out there system, but I was in a hurry so I just grabbed the few items I wanted and paid cash, which was just as fast as it is everywhere else.
I do want to stop by before it closes, and see if customers figured out their systems, in the year and a half the location has been open.