I went to ASU for 4 years and only visited ChuckBox once due to my roommate dragging me along. I remember it being packed and we ended up having to sit outside in the heat so my experience at that time wasn't the best and I never went back.
However the other day I was craving a burger and decided to give it another try. Man, I don't know what I was thinking the first time around. The burgers are amazing! I love the charbroiled taste!
It does take a while to get your foot because it is cooked as needed right in front of you, so the line can grow to be fairly long while people stand there and wait for their order. They have a bar in the middle of the restaurant that has all the fixins for you to add to your burger (ketchup, mayo, lettuce, tomatoes, etc.)
Some of the downsides that made me give them 4 stars instead of 5 is that there are no refills on drinks, it's cash only, and there aren't any covers for the small fixin bar (there where a couple of flies hovering around the lettuce and pickles that grossed me out).
But in terms of their burgers, they are delicious!