We did this, and it definetly is worth the money, food is excellent and plenty of it, and same with desserts, and server kept the drinks coming ,he was excellent. The earlier you book the better chance of getting a table right at the pool, as tables are assigned when you book, when we went i was at the
2nd table, as we where the 2nd people to book, if you ask when you make reservations ,they will tell you how many have booked in front of you. I bought an AP as it worked out better as we had a few days planned for Seaworld, got free parking and 10% off our Dine with Shamu ressie, and same with buying food and items in stores , so could be worth thinking about.