I have been here several times for different shows and always had a pretty good time. The seating plan is open, so you are never too far away from the stage and can hear everything well from wherever. It is dark and cool underneath, so bring a jacket if you get cold easily. The darkness gives it a special sort of ambiance.
They serve food and drinks, and while I've never had either-besides the house wine, I saw a few items on the menu worth trying sometime.
The service is hit or miss. It can get pretty busy sometimes and I feel that it might be difficult to be a server here-hard to see, hard to get around.
Overall, had pretty decent experiences here and would definitely come back sometime and try the food.