I love seeing live music in old theaters like this. I like that its all seating. I didn't mind standing shoulder-to-shoulder with people for three hours at shows when I was in high school, but now I'd much rather sit.
On the negative side, I think the stage setup is awkward. It's really high up, like halfway between the floor and the balcony. If you're on the floor, you're looking up the whole time, and if you're in the front of the balcony, you're practically looking at the tops of all the performers heads.