This. And I do their work a lot more slowly because it's not my regular job, and I actually already had to do some of the work (getting the items out of my trolley and onto the conveyor). Now I stand there forever fumbling with barcodes, trying to get bags to stay open, switching between getting items out of the trolley and scanning. The old checkout system is so much more efficient when you are buying anything more than a couple of items at a time.