I really liked the local Amazon Fresh, until they discontinued "just walk out" and replaced it with those hellish smart carts. I scanned one item successfully with the cart, got completely stuck trying to get it to scan a second one, handed the cart back to the employee, and never went back.
I just pay cash at the regular cashier. The smart carts aren't the speed-up Amazon wants them to be, but at least the faster traditional shopping method is still an option, unlike Amazon Go.