My opinion is that the food is good, though not much better than you would find at any local seafood place (Red Lobster, etc). And, the prices are very high.
But, the atmosphere is fun - especially if you can get a table by the tank. The kids love eating while watching the fish swim by!
Personally, I would explore the Living Seas pavilion to see the fish, then eat someplace else where the food is a little better and lower priced.