I went on it October of 2002. I thought it was fabulous. The boat is very very nice, staff was great, food was good.
I thought the diving was very good, but not great. You really get to do a wide variety of dives. I did reef dives, wall dives, night dives, drift dives, a shark dive, and even a very small cave dive(like 15 feet in). Visibility was in the 80ft range most of the time. The water was warm enough I was often diving in a bathing suit, although I think I was the only one doing that. They do 4-5 dives per day. After the first day, I started skipping one dive, but some people did every dive.
They also give you the option for some shore excursions. One
of my favorite experiences was kayaking through the mangroves on a beautiful deserted island. If you have a special request let the Captain know and they will do their best to oblige.
Ryan