I just finished watching the movie and all I can say is... WHAT A PIECE OF CRAP!
Epic fantasy movies need kick ass likeable leading characters, and in this movie, the kid playing Eragon comes across as a little winy . I thought the acting was alright, Malkovich was decent, Irons his usual, but the Speleers kid is just not the man for the part. I'm not saying he can't act, just that he can't possibly play the part of a fantasy epic heroe.
On top of this, its one and a half hours short... WTF? the book is about as long as any one of the LOTR books, and theres definitely enough for a 3 hour movie. They crammed too much into too little time.
I have to say I'm thoroughly dissapointed with this movie. I thought it would at least be entertaining.