I've been wondering about that. The first time I tried them 6 months ago, things got so messed up, I had to go to the customer service counter to get a refund on the resulting overcharge. Things seemed more complicated then, but I'm not sure if that was because I was unfamiliar with the system. No, I believe (possibly incorrectly) that Walmart has simplified them since then. Now they seem quite easy to use, but I have to be careful when I swipe the code reader. If that motion is not decisive, it can record the price twice, but the attendant showed me how to simply fix a double charge. Still, I find I must pay close attention to what I'm doing.In the beginning, Jules, they were simple,