I don't reread books before I see the movie anymore. I find I enjoy the movie more if I'm not constantly comparing it to the book. I can enjoy the movie for what it is... a lesser version of the book. Ha!
That being said I liked the movie. It's been years since I read the book so I don't remember a lot of details. I did catch a couple of differences though.
And somehow I missed that this was a two part movie. I don't know how I missed that. It's the trend now, isn't it? So when the movie ended I was super disappointed. The end was nothing like the book. Except... it's not really the end. There's another movie coming out.