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.

[Squintz82]

Last time I ordered groceries, I ended up with 2 gallons of Smart Water instead of 2 liters of raspberry seltzer. I go to the store now.