I found the payment system insane.
You scan your card at a gate and then go into a food court like area where you grab whatever you want and then leave. supposedly there are a ton of cameras that match the person paying to what they leave with.
I know technology is amazing, but I don't see how this can possibly work without many errors in a crazy environment like game day.
For example, I was with a group of four and we were going to grab some food. I scanned my card and we all went in, where we split up all looking for whatever we wanted. It was super busy, and we all grabbed something and left.
I think I ended up getting charged for 3 of the 4 items. God only know if some other poor soul was charged for the other item. Not too sure this was a great idea.