There's an Amazon Fresh store near me, with the Big Brother no-checkout-needed setup - you scan a QR code from their app when you enter and when you leave. You can pick your own produce, but everything is sold by the piece, so it's hard to compare prices to those in normal supermarkets that sell produce by the pound. Items that are not in their weekly ad are mostly not cheap, and they change prices of many items on the shelves every week. One thing that I do buy there is milk: a half gallon of the store brand is cheaper that in the supermarkets and it is made in the same dairy as a local brand that is in the adjoining case for $1.50 more. When you leave, you don't get a receipt - that arrives by email a few hours later, so you have to trust that what you took from the shelf is recorded accurately.