I was not terribly impressed with their food, but I will give them another chance because of their service.
I ordered a Montana (plus loaded fries and a drink, $3+$2 upsize). It comes with whatever fancy name for beef they have, some crispy onions, blue cheese, and a strangely orange BBQ sauce. The woman before me ordered a Montana but asked for no bleu cheese. I did not make the same request. When I realized that I didn't see or taste any sort of cheese in my sandwich, I was pretty disappointed and brought it back to the pickup window.
The guy at the window acknowledged my complaint, and instead of adding bleu cheese (which I later found out was because it was "melted" into the sandwich), he got a brand new sandwich made for me, free of charge (and some extra fries apparently). As I found out by taste-testing both sandwiches myself, they indeed were missing the cheese the first time.
Just on the sandwich's merit, I would have given this place three stars because I would've liked more meat/filling and maybe a not so dry bun. Sad that these were both running themes at the festival today (see my Chi-Town Hustler review). The fries were good though, and the willingness to please the customer is important in any food service business. Big props for that.