He is extremely knowledgeable, articulate, friendly and watched us like a hawk which I’m happy about because if I’m going to be underwater where I can potentially die, I want attentive, expert supervision. As a busy New Yorker, I appreciated the option to do the confined water portion in only one day in a small class where there are a maximum of 4 students. 9 hours, however, is a long time to spend mostly submerged and I could not recognize my feet that had transformed into white prunes by the end. Perhaps because i have not swam with this much intensity in a long time, I am exhausted. I do feel mighty accomplished though… we got through it! Thank you Rey Diving.