"Gripping" is certainly one word I could use to describe the book, I could list many more but that may tell you more than you should know. At least if you haven't read the book. Yet.
Anyway, I just got back from watching the film at the cinema. Slightly disappointed they changed a fairly large chunk near the end but overall it was great. Not sure how long the film was but it sure flew by. There's not a boring moment.
But at the end of the film what stuck with me, and my [graphic design] friends who I watched it with, was the amazing titles at the beginning. Music and animation.
Awesome that I was actually able to find this online no problem.