To be honest, the book was already boring to begin with, and the movie really didn't help. There is so much potential here, but it's executed in such a dull way, you don't even care what happens to anyone. Could have been so much better, I wish it was so much better, but this is the kind of movie you've already forgotten about after finishing it.
This was a very nice movie adaptation of a very amazing book, which succeeded to give back a lot of the source material. Still, I recommend reading the book first, if you have the chance, since - especially near the ending - the movie felt a bit rushed, and it definitely makes this movie more enjoyable if you know all the details.
Either way don't let the synopsis fool you, this one is a very emotional movie with lots of laughter and tears both. Well done, Sweden!