That's interesting - I don't know if I've ever heard of someone going the other direction. As long as everything is bar coded, and you've got excellent industrial scanners (that's the key - not those crappy scanners that cashiers normally have to deal with) - Checkout via Kiosk is pretty effortless. In 12+ months of using them, I have not had a single bar code failure - which is pretty amazing.

About the only thing that's tricky is putting a large flat of eggs into the bag, and there's usually one person monitoring six kiosks who can swing by and give you a hand with the bag (it's kind of a two person job)