I am always a critic of movies based on books because they leave too much stuff out for the viewer to fully understand what is going on.
Here they have the chance to recify that situation by splitting it into two movies. Unfortunately, it doesn't work.
Having had read the book long ago, I could not remember much of it in going to the movie. As it turns out, reading the book was much more important in this one than any of the others. The simple truth is "it is much harder to carry a story through dialogue than it is through prose". If the only way to carry a magical story is through black & white photography then maybe they succeeded, but to me the whole thing was dull.
We've become a society that needs to be entertained because we've lost our imagination & the ability to entertain ourselves. Read the book; skip the movie.