GSU: If you're referencing Cozumel - I agree like everyone else. If you're talking about Nassau, I don't know if I'd spend that money. It's a much shorter program in Nassau than Cozumel. In Cozumel, about 15 of us went through the motions individually as mentioned above so we got a lot of time (and it helped that we had a mom and her baby as well as a young one in training...we got to play with three of them!). In Nassau, we were grouped with 6 other people, and you went through similar motions within your family. Luckily, the guy saved my DH and me for last and since we were honeymooners, he let us do everything twice with the dolphin.
One other tip...in Nassau, we could bring our waterproof camera into the water so you don't have to feel like you need to buy their photos. In Cozumel, we couldn't but we did buy several pictures and negotiated prices other than what was posted.