This experience has really improved over time. Twenty years ago, in some locations, the average Walmart customer would have had more luck operating the space shuttle than they seemed to have with the self checkout. Long lines of people who apparently had never seen a TV, let alone a touchscreen interface, chased me over to Target. I was that theoretical consumer who was happy to pay more... Something has changed since then, because I can't remember the last time I was in a Target.

They didn't have them at Wal-mart last time I lived around one - around 5 years ago. I use those in every store that has them, though, so long as possible (I can't if I'm using cash).