Ok firs tthings first. GO see it now. Best movie this christmas without a doubt.
A few details that irritated or caught me:
They were mostly respectful and very good with the christian alegory, but sometime sthe imagery was a bit heavy handed or 'cute. Note the spear in Edmunds side for example.
The whole white witch = Boudiccea thing was irritating.
Actually I really liked Tilda Swintons performance, but she never showed any of the fear or venality that should have been part of the role; only defiance and ass kickitude.
The kids were cute, really looked like a family, and were decent performers (rather important that; but a lot of little irritations:
1. Peter is a stronger character than that
2. Susan is both sweeter, and more annoying
3. Edmund... well they jsut screwed that one up
The kid who played Edmund did a great job, but the screen play and direction just butchered his character (whe is actually the most important of the kids in the later books).
Side note, he apparently grew 6" over the filming of the movie, and it definitely showed.
Production design was great, and the animation was excellent, but the anti-aliasing on composited shots was poor. You could clearly see the environmental differences between animated and real, even in matted backgrounds.
Oh and some names and places were messed with a bit. Part of the hollywood thing really.
I should note, great voice acting all around; but liam neeson didnt have enough resonance or depth for Aslan. Or at least they didn't mix him that way.
So now that I'm done criticising, let me say again, this is a great movie, you will be smiling from beginning to end, your kids will love it... GO SEE IT
Oh and buy them the books. Read them to your kids if they are too young, or have them read them, but please buy them. Jack Lewis is one of the great authors of all time, and every child should read these books.