The ones that need to match the weight of the product are absolutely horrible and full of errors.

The ones that only need to scan barcodes are ok-ish. Sometimes you can run into weird situations, like I managed to find a product that had two barcodes for some reason, and I scanned the “wrong” one and it confused the machines. Or there was a product that printed their barcode so tiny that the machine couldn’t scan it. But those are rare.

The fun part is when you try to buy any alcohol because over here they need to call a human to confirm you’re an adult.