I tried one of the newer versions today at a fast food place. This one is different. It was large countertop machine with a 32" screen, one ice dispenser in the middle, and two drink dispensers on either side. The scrolling was fast. This only had options for cherry, raspberry, and/or vanilla, but I could select and combine any combination of those three. Maybe the older machines have it to, but this one also had a extra flavor shots.
Only the bottom of the screen was used for beverage selection, and there was no physical button at all - just the touch screen. Most of the screen was flashing Coke animation and ads for stuff available at the restaurant.