Has anyone used them? What did you think? I have been looking at dive shops online today and spoke with a couple of them on the phone. These people were very nice and seemed to understand that I'm a little nervous since I am new to diving (completing my OW dives this weekend). They said I could hire a guide which is the advice some of you have given me. One of the other shops that is frequently mentioned here and gets positive reviews made me feel a little like I had nothing to fear and that I really didn't need a guide. I got a better feeling after speaking with Fl. Keys Dive Center but don't know anything about them.