While I haven't used Target's, I do like Home Depot's self checkouts. They are pretty intelligent on their own, like just swiping a card to initiate the payment process, even if you don't press the "pay now" button. Then, when you do encounter a problem, there's an attendant for every four checkout stations that can help you from their workstation. Usually they know you're having a problem before you can even turn to tell them so, and by the time you do, they're waving you on and the problem has been resolved. My only issue with them is that they shut them down about an hour before closing, and waiting for a human cashier is even more annoying after the self-checkout experience there.