It depends on what you like. if you like venues like House of Blues you will hate this place. For me, this brings what I miss from England since the place reminds me of Brixton academy in London. A proper venue made of an old 1920's theater with marble stairs, standing room only, etc. The acoustics are pretty good to but again, it depends of what you like.
I agree every show I've seen at the Congress has been great, it can get a little warm in the summer but that's my only real gripe.