> This is presumably much better for throughput, but much worse for making sure that what you're leaving with is what you purchased. Admittedly, yes. But there

> This is presumably much better for throughput, but much worse for making sure that what you're leaving with is what you purchased. Admittedly, yes. But there are usually random checks. > (Also, how does it accommodate a decision to put something back? I've never seen such a system.) You press the "put back" button and scan the thing you want to put back.