Hiya, my name is Greg and I have recently signed up on the SB. Have been diving for several years and recently finished DM training for both IANTD and padi. Those were great personal accomplishments but I'll have to say that I really like my Dolphin Drager (IANTD) cert and training dives. Rebreathers are not for eveyone, but for those that get do, WOW!!! The SB is a great resourse and I'm glad I finally signed up.