My wife and I did this two years ago and thought it was great.We were 60 and 57 at the time.Take an underwater camera with you.The divers that go down with the groups will take pictures of you.They took some crackers and broke them up in front of you and when the fish come over to eat it then they take the pictures.
When we went there were five groups and we each had about twenty min.down
The scooters that you are on you sit on and not the typy that pull you.
I hope if you take it they excursion you have a lot of fun.
ps;there are a lot of turtles that you see walking the bottom.