No, I haven't been yet but have friends who have. Only heard good things so far.
Snail has played there so he can tell you something if you can entice him into this thread.
So far, they hold a special place in my heart because they are very Shoegazer friendly. I've already directed bands there I know looking for Baltimore/DC area venues. Also, I've told other friends about shows that have happened there and they all came back to me with good reports.
Not far from you Sonick so that should make you even happier.