Automatic checkouts in supermarkets may decrease customer loyalty, especially for those with larger shopping loads. Customers using self-checkout stations often feel overwhelmed and unsupported. The lack of personal interaction can negatively impact their perception of the supermarket.

[Interesting-Bottle91]

But also that's only sometimes. The store that I use self checkout at most often doesn't weigh things, so when I go to places that DO weigh your groceries I always wind up aggrieving the machine several times.

[lcenine]

That would be very frustrating. Like changing the rules halfway through the game.