I went there today around 12:30 for my first time and had a great experience. It was very crowded when we arrived but we managed to get a table anyway. Waited on line for about 5 minutes to order, and 5 minutes later we were eating.
The burger was very delicious. Extremely juicy and nice thickness. I got it with all the trimmings, onion, tomato, lettuce and pickle. I think they also put there own kind of sauce on there which tasted like some sort of horseradish mayo. The fries were classic shoestring, Mickey D's style. When we left it was very crowded but not uncomfortable. Oh also, I order the burger med. rare and that's exactly how it came. I read in a previous post that when it's busy there all of the burgers are cooked medium, but luckily that didn't happen to me.
All in all, I think its a cool place, and a GREAT burger. I don't think you could do much better for the price in that neighborhood. Next time I go back I want to try the brownie.
P.S. My one complaint was that the heating was broken in the hotel lobby and it was freeeezing in the Burger Joint too.