Bad book adaptation.
It sounds crazy, but this film makes me physically angry. The Inheritance Cycle is my favourite film series, but this movie butchered the first book, Eragon. I truly hope they don't adapt the other three books. They did a bad job.
While I liked the book Eragon, I couldn't bring myself to finish reading Brisingr because the dialog felt so artificial and the book wanted to tell a grande story but it just couldn't keep up with such true fantasy gems like Lord of the Rings or Harry Potter.
The same thing is true for the Eragon movie: the dialogs feel artificial, the story isn't told in a gripping way and the actors just don't bring the characters to life. By giving it 6/10 I am kind and I only do it because the scenes with Saphira are cool and I think that the SFX guys were the only ones that managed to do a decent job.
As I decided half way through Brisingr, I'm deciding after watching Eragon: never again!