Well, we did it with the dolphin swim, but even without it would have been a beautiful day.
I don't know when you are planning to go, but if it is during a time that is generally hot and you can pretty much count on getting a hot sunny day, I would say it would be worth it. We thought it was a wonderful way to have a 'down' day in the middle of a busy, hectic Disney trip! The kids really enjoyed the 'resort' beachy feel and we got a much needed rest. But we went first week of November and it was a cool, overcast day, so that was disappointing. If not for the dolphin swim portion I would have been upset at spending the money because of the lousy weather. But if it had been a beautiful sunny day I think the expense would be reasonable for what you get.
the place is very lovely and the food was also very decent. The drinks, however, I was disappoiunted in. It is only beer and malt beverages (for alcoholic) that are offered. I assume that the reason for this is because it is owned by Anheiser-Busch. I would have liked a mixed drink such as a Margarita or Daiquiri on the beach instead.
Hope this helps!