I chose UCSF because of their birthing center. I live in San Pablo, and was looking for a place to have a water baby. There are so few facilities! I found one in SF, but the cost made me decide it was not the best route. (I have HMO style insurance, so wanted something from a "group".) I too looked at CPMC, had friends that delivered there. They all said great things, but UCSF was willing to let me at least labor in water if I wanted, they were pretty much willing to allow you any style of laboring you wanted and would step in to assist the birth. (You would have to come out of the tub though.)
My labor and delivery went so fast, that I got to the hospital just in time. Had no time or need to labor in water (I had spent so much time in the shower at home before we left - oh how relaxing!) as I delivered right after we arrived. The room was beautiful, the staff was fantastic. I have since recommended it to other mom friends who also decided to deliver there.
It is a very comfortable recommendation.
They do a tour. Take it.
Good luck.