B&B Scuba is the best!
I am a certified diver now, thanks to these guys (Brad, Stan, Steve, Bill and everyone else - you are the best!). They give their every diver a lot of personal attention, so you feel among friends all the time. There's never more than 3-4 divers per guide. I really liked early departures, too. By the time we were leaving Molokini, all the other boats were just coming in, and it looked like the place was going to be VERY crowded shortly.
Next time I am on Maui, I know who I am diving with!