A good female friend of mine did her OW at Hollywood Divers with Bill - she RAVED about him!
I did my training in Fiji but as an L.A. girl have been into HD plenty of times to chat with the fellas and always find them very charming....
Unfortunately, I didn't get to chat with the "fellas" at HD (chatted with Nicky, who was very cool and helpful), but I definitely got a fun, more lively and social vibe from them that I liked and felt comfortable about, than I did with Dolphin Dive (though talking to Tim was great) - I don't know if that had to do more with the fact that it's very centrally located, and DD being a little ways out. still deciding...