I use them as often as I can when I go to Wal-Mart. I can stand in line for over 35 minutes to get to a cashier, or do it myself in 10. I fumble a little when it gets to produce, but I try not to get rattled. I always pay with a debit card, but I'm always six messages ahead of the dumb machine. In and out, total shopping trip in less than an hour!