I’ve learned which stores self-checkouts in my area are a PITA and which ones tend to work. I’ve found the scan and place on belt type are more reliable than the scan and bag variety.
Grocery stores are always a PITA, and the monitor spends more time helping me than they would if they were a normal cashier. There are discount stickers on meat, and then it fails to recognize that I put the item in the bag, and a person has to clear the error. And you can't buy beer or other alcohol in the self checkout.
Home Depot's works good, OTOH. However, they can't protect your credit card info, apparently, so whatcha gonna do?
That’s my experience as well.
I think the scan and bag places have sensors that can tell if your food item is above or below a certain median point and always bed garbled.
The scan and place on belt are good but the only place that has them is Fresh and Easy which I don’t like.