Comment by AppleAtCha

The best machine I've seen so far is one in my local gas station, where there's just a surface and a camera. Toss whatever you want onto the surface, all haphazard like, check that the screen agrees with reality (it always has so far), and bump your watch/phone/credit card and walk out. We're talking substantially less than 30s, oftentimes less than 10s.

Yeah, I've been using self-checkout at my Jewel (grocery store) in Chicago weekly for about a decade (multiple times a week in the past, before I bought my own cart, I walk to it), and had maybe 5-10 issues with the scale in total. None recently.

I've had three failures in the last week. I had the "thought my bag was product" problem, the "I somehow double scanned" problem and the "need a reset but no one can explain why." The first and third were on the same visit.