The stack after 1am is the only thing I ever really came here for.  But it sticks out in my memory.  Ah the goodness.  I also went to the other newer location in downtown Champaign.  But its almost too new and clean to enjoy properly.  This place is dingy and small, but it gives it character.  At either rate, if you in town and awake late at night stop by and order the stack.  You'll be amazed you ate it.  And more amazed you loved it.