Watched Narnia last night and was very disappointed. I'd read the books as a kid and they left a lasting impression on me, but the movie was so 2-dimensional. none of the depth and magic of the books. And in the end it was just another forgettable kids movie, unlike for instance the Lord of the Rings and the original Star Wars trilogy, both of which were for everyone.
I know everyone will say that a movie can't do justice to a book, but both the Harry Potter and Lord of the Rings movies did.
And BTW, the iconographic parallels to Christianity are far more pronounced than in the books (see Garden of Gethsamane, crucifixion and resurrection). Of course, if you have no knowledge of Christianity, you wouldn't notice.