Chris J.
Google
Honestly dont understand people complaining about having to download an app and register just to shop, it takes as much effort as installing Candy Crush to be honest.
Loved the experience, and was genuinely surprised as to how accurate the system is, it's a tad weird at first just picking up items off the shelf and dropping them in a bag and walking out, feels a little like you are shoplifting, but once you get over that it's just really simple.
Staff have always been helpful and friendly so I think those complaining about rude staff are more likely complaining that they wouldnt let them in without the app, which is pretty much their job so why would they risk getting fired over your inability to setup a bloody app on your phone?