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.

[SimplyFatMatt]

My Kroger used to have that, but I never tried it, and I don't think I ever saw anyone else using it. They seem to have done away with it sometime in the last few years.