We use Ocean Concepts for all of our West Coast dives, we love South Seas - the boat and the crew. Dive companies are pretty competitive here, its hard to tell who is a good one from advertising, but of the ones that we have tried Ocean Concepts stood out. However for south shore dives, we like Paradise Divers. Great crew, lots of laughs, high standards from both companies.
Pros: great crew, lots of laughs, safe