My wife had a bad experience with our ow instructor that our dive shop handled to our total satisfaction. The instructor in question didn't seem to want to be patient with my wife. My wife was maybe 15 minutes (that's right, 15 MINUTES) behind the rest of the class in getting comfortable snorkeling. The instructor pulled her aside and asked her if she was sure she wanted to dive. She (the instructor, a female, so no chauvinism issues should have been the cause), then proceeded to tell my wife that many women sit on the boat while the husband dives. The instructor then had my wife sit at the side of the pool while the rest of us worked on skills. I didn't do anything because I thought the instructor was going to work with my wife one on one. Not so! My wife just had to sit there, watching, while the rest of us finished. Then the instructor had to hurry off to go to a football game.
Needless to say, we were furious. We complained to the dive shop and they got another instructor to work with my wife one on one in a private pool. He was great! It took several sessions for my wife to regain her confidence, but he was very patient and helpful. That first lousy instructor almost ruined her diving life before it started. Well, my wife was certified by the good instructor, and now we are going to Little Cayman in August. She has also been Nitrox certified. By the way, I haven't seen the bad instructor since, so I assume they don't use her anymore. The good instructor seems to be in the shop every time we go there, so I think he won preferred status .