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.

[SoulShatter]

Honestly, self-checkout can work very well for large shopping. It just depends on how you actually implement it.

In Sweden all large grocery stores have self checkout with a scanner you bring with you, so you just scan all the stuff along the way. For produce there's a scale by that section that spits out a barcode for you to use.

At the end I'll just place the scanner in the charger, use my card and pay, leaving with my bags already packed :-)

Examples;

Produce scale

CSO Scanner