Unfortunately, the movie is receiving very poor reviews despite its director Tomas Alfredson (Tinker, Tailor, Soldier, Spy), executive producer Martin Scorsese, and stellar cast, including Michael Fassbender as Harry Hole.
The main problem, according to the various reviews I've read, is that it does not capture the essence of the original novel and is largely incoherent in terms of its editing and screenplay. The Chicago Tribune also notes that
Among all of this [the incoherencies of the movie] is some truly gruesome imagery, and unimaginable violence, deployed cavalierly, and committed primarily against female victims. Our antihero Hole is himself a bit of a boor, roughing up his female partner to make a point, because he's got to save the day, his way. What a guy. With a perplexing tale and some very odd creative choices, it's so easy to laugh at The Snowman, but this kind of tale shouldn't inspire laughter.
If you've read the original novel, you may still be interested in seeing the movie adaptation with the caveat that it will not live up to its source, according to most of its critics.
Here's the movie trailer.