I have feelings too, so I avoid them like the plague. They never seem to work for me. I get unexpected item in the bagging area loud announcement, and people from those waiting look at me. Then I have bought a bottle of plonk, so loudly Approval Needed! Look round for the poor girl in the area who is trying to serve all the poor nerds trying to self serve. It is not what I need when I am trying to buy and pay, nothing more nothing less. I have never seen a machine shoot out money ........ swallow it yes. Give nothing yes.