I haven't seen the movie, nor do I intend to. Oh, maybe it it's on TV late some night and I've got insomnia and there's nothing in the house to read and there's nothing on any other channel except infomercials and episodes of Law and Order that I've already seen 20 times. ;-)

However, everyone I know who saw the movie and was also familiar with the books has said that the movie does not in any way reflect what's so good about the books.

I think that if you enjoy reading fantasy with young protagonists - especially if you like C.S. Lewis' Narnia books or (even closer in feel, I think) Madeleine L'Engle's Wrinkle in Time series or Lloyd Alexander's Prydain Chronicles - then you'll enjoy these.