I think the movie's going to be better than the book. The one thing I didn't like about Eragon was that it followed the same basic storyline as Ep. 4 of Star Wars..
1. Not enough Axel
2. Not challenging at all (they tell you what you're supposed to do)
3. WAY too many cutscenes (thank goodness you can skip them)
4. The musicals in Atlantica (I got Sora's singing voice stuck in my head all day)
5. The introduction with Roxas was way too long. It shouldn't take 3 hrs. to figure out how a game works