I just tried it at McDonald's... Very easy payment but the cashier was clueless as to what I was doing. The manager walked over and confirmed that all went well.
Figures an McD's employee would be clueless, I'm surprise the manager, knew what they were doing. Half of the time, I go there everyone in the back or front doesn't know what they are doing, plus the food quality has gone way down. That one reason why, I simply stop going there.