I did my pool training and confined water dives back home in the Midwest (Minnesota). I never really swam in the ocean before, so I was nervous about going into the big drink. I did my open water dives and completed my padi certification with O.D.A. They took the fear out of the equation and made it really comfortable, despite the exercises. I didn't think i would want to go back to Ohau after my first day because it's to commercialized for my liking. But I will return because I want to do more diving, and I trust these guys. My only regret is I didn't buy a T-shirt from their store (loved the "times up T-shirt). I did buy another mask though, as a spare, I learned i definitely don't want to ascend to the surface without one. Learned that during the exercises.