I've played off-and-on. I'm with you on it being a fun way to get some running and jumping in.
The problem I've had is finding partners. If someone's way better than you, they lose interest, naturally. If they're way worse, you lose interest (plus you don't get an exercise making your opponent run all over the court).
I'd like to try handball. The old school handball -- not the dumb new one. Even tougher to find partners.