Marin Skin Diving has the best scuba instructors in the Bay Area. I've been to other places in the past and the instructors at Marin Skin Diving really seem to care about you learning how to safely scuba - not like the other places I've been to.
They are patient and recommend products to you that they themselves use to dive with. Their prices are what you would expect to pay for scuba gear, and they often have really great sales. They can also special order gear for you if needed.
They also arrange dive trips out in Monterey Bay and locales such as Cozumel and Palau.
I had a lot of fun getting my PADI certification from Marin Skin Diving. They also do NAUI and SSI training, you choose whichever certification company you'd like to go with because their instructors are certified with all three companies.
I feel like I am a safe and comfortable diver because of my instructors at Marin Skin Diving.