In August I took my four turning five a few days after the trip... to both USF and IOA.
My DD, loved both. She went on everything at USF. She especially loved MIB, and ET! She wasn't scared of Terminator II, or Earthquake. She wasn't fond the first time of Kong (moot point now,) or Twister.. after the first time she did ok. Jaws didn't do much for her either.. she wasn't too scared.
She liked the Curious George and the Fievel area. She thought the Barney show, and the Animal show were ok, but sort of boring. She liked the Nickelodeon show, but was too little to do any of the games.
She loved MIB! She really loved MIB! I thought she would be scared the first time with the big bug at the end, but she wasn't!
As for IOA... she loved Cat in the Hat, she was just talking about that yesterday. She was even saying yesterday, why she couldn't sit on the end of the boats in Jurassic park.. that was scary the first time for her, but then she loved it! She liked Dudley as well. Loved over stuff like Unicorn, and Storm Force.. and she really liked Spiderman as well. (she was afraid at first, but loved it after!)