It's not a fancy place and the clientele is pretty questionable. You'll often find someone sleeping in the alley behind the adjacent building - so don't slam a blizzard, get a sugar buzz, hop into your car and go careening out the back of the parking lot, only to run over a dozing bum!
It can be a little bit difficult to pull out of their parking lot, but aside from that, the place is always clean and the workers have always been friendly and efficient. Hey, it's DQ. What more can you ask?