Ok, it's not the wonderful burger that my Californian friends were raving about. I'll even second those here who suggest preferring Five Guys' burgers when it comes to chains. Still, it was very good and I'd definitely come back if I were in the area.
It's cheap, and the various not-so-secret-off-menu options provide endless calorie opportunities. I notched a star off because their fries are just plain terrible.
Warning: if you have agoraphobia, do not go there. It's CROWDED.