I think the disappointment I felt in the movie version was due to its lack of character. The makers were obviously falling over themselves to emulate The Lord Of The Rings.
What they should have realised is that CS Lewis' fantasy was a different beast to Tolkein's and merited a different approach.
The pointlessly OTT action scenes (particularly under the frozen waterfall) were so histrionic that it was almost funny. And the photography was all so bright and cheery, in that oh-so-Disney way, that it couldn't hope to match the brooding gloom of LOTR.