first off i havent used red sail but this is from what i have heard from some people who used them when we were in cayman at the same time.
1. they are expensive at almost 100 per 2 tank trip and something like 75 for a 1 tank SRC trip, and thats if booked ahead it was like 110 cayman if you booked it there (thats around 140 US)
2. the are cattle boats, and who mentioned 15 you must have been on a light day because the days i saw them unload at the westin (just north of the hyatt) there were atleast 20+ people on the boat.
3. one person mentioned that the dives were strictly guided first person to hit 1500 psi the whole group came up, which to me is wrong especially for what they charge (heck i would only be at 21-2200 lbs after being at a 100 feet for 15-20 mins).
also i know that with both neptune and Ocean frontiers, and morritts will watch over you but be sure to let them know you are new divers and they will take good care of you, and if you need to hire a private divemaster for you first trip or two till you get comfortable.
if you really want to get some good diving at a good price contact casey (caymancase on the board) at
Neptune's Diver's if you want to dive the west side, or contact ocean frontiers or morritts tortuga divers (Drew sailbum from this board works there) on the east end. only ocean frontiers will pick up from the west side though. plus there prices are just about the same and lower then what red sail has.
FWIW
also if you want some good places to eat on SMB let me know and i will let you know