The stage and seating is small (think elementary school auditorium size) and every seat is great. There's no silly/embarassing security (insert "security theater" joke here) checks like at most SF venues. There's only fun. The prior time I watched Tommy was in Mem Aud at Stanford from the balcony--still a good performance, but the intimate theater really engrosses you in the show.
There's also a really tasty Mayan restaurant a block away.
Highly recommended. You can usually find discount tickets for the show on Goldstar Events. This is the final weekend, so hurry up!