Like so much technology, it's not very user friendly. Great if you have figured it out or had help and then use it all the time. Not intuitive at all.
And then, I can't figure out how to pay with VISA because they want you to use their card in this particular case and kind of hide the Generic VISA payment option. Time will tell if I make as many mistakes as their systems, that often don't give you sale prices at checkout. Tired of having to watch all that stuff like a hawk. With self checkout, I can be much more relaxed and inattentive.
I still pay cash , so far that's the universal language.