I go everytime I go to Disney, with the exception of this trip coming up, a 4nt Disney trip just doesn't warrant a day out to Sea World.
However, whenever at in Florida, I enjoy getting out there. Im assuming you have kids, but you didn't say if you did, or how old they are.
They have 2 roller coasters, the newer one Manta, is great. You sit tilted forward in the seat, like flying, basically, like a Manta. The other coaster, Kraken, is your basic, steel, looping coaster. I've never had a problem while riding either. Obviously it's going to be up to the individual person, and whether or not you can handle it.
Other than that, they have a 'log' ride, more than your typical log ride, somewhat comparable to splash mountain just not as good as splash mountain.
They do have the best sea lion and otter show you will ever see!! There dolphin show is pretty decent as is the whale show, is the big beast will cooperate

Last time I went, dumb whale got stage fright and wouldn't cooperate, had to bring out a newer whale they were working with and do 'tricks' and stuff. They do, as pp commented, have feeding time with dolphins (large tank, but does get crowded, they take pics of you which you can later buy) and sting rays.
They do have a simulator ride, kind of a star tours ride but based on the artic. And a kids zone, with kiddie rides. Again, depending on what ages your kids, might be appropriate, might not.
Food is decent there. Depends on what you want to eat, and what you want to spend. I've done the 'Dine with Shame' which was amazing! You sit tank side, in a nice little alcove restaurant and Shamu almost swims up to your table, about 3-5 feet away. It's a beautiful buffet meal, which was really nice. Also, ate at 'Sharks Underwater Grill'. Think, Coral Grill (?) but with sharks in the tank, resting right beside your table....and the menu, when I was there, was quite good. Regular CS is decent as well.
It's a great quick park to visit. Im done usually by about 5:00. I never need the second day to see it. I never find it 'overly' crowded there and it's just a nice little change of pace

Enjoy if you go!!
Jenn
