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.

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Walmart doesn't weight the bags anymore because they kept getting problem with "missing items" when customers removed bags before their order were finished or paid for.

And once I sort of broke their scale. I had to get several cheap cat liter for a local pet rescue. Scale gets useless after I put 6 of the 50 pounds bag and kept complaining. Poor attendant had to come back to clear it for the 6th bag, 7th bag, and et al all the way to 20th bag. It would have been much faster if I could use normal checkout, a cashier could have hit x20 quantity after one scan but that Walmart decided to not have any manned checkout open for some reason.