Two weekends ago, I got to try the new kiosks at Pecos Bill that let you order your own food, and bypass the lines for a human. It worked fast and well, with one exception: I'm no stranger to this kind of system, and I got stuck anyway.
After you click PAY NOW, the screen didn't seem to change. I kept punching PAY NOW and didn't notice anything change. Only by cancelling my order and starting over could I figure out what happened. When you first click that Pay now button, a new panel pops up on the left side of the screen, and it wants you to click the method (ie, credit card). Once that panel is there, clicking the Pay Now button over and over again does nothing.
To reduce this confusion, they need to program that PAY NOW button to disappear after you click it once.
But otherwise: two big thumbs up.