I did indeed. It was awsome and I would do it again!!!
Suggestions??? Dive! Dive! Dive!
Things to look for: They have over 65 variates of tropical fish, sharks, rays, a giant sea turtle. They have also construted a sunken Spanish Gallion complete with a 300 lbs anchor at the bottom and cannon balls that people can toss around to each other. Go ahead and "donate" the extra $35.00 to get the DVD of the experience. I have watched mine over and over with friends. The first 20 minutes or so is a guided tour with the dive master then it is a free swim for the second 20 minutes.
I will see if I can find a way to rip the DVD and post a copy somewhere so you can see it.
Things to watch out for: At one point they have you swim through a ring of rock and "coral" (it is imaganeered) and several of the group bumped their heads on it. I had the distint honor (in our group) of being the first one to do so.
Here is the dive report I posted from WDW and the cruise...
http://www.scubaboard.com/showthread.php?t=119632