Being from Europe and watching too many American movies, one develops the appreciation for the ones we make on this side of the ocean. It is so different from the American approach. Here, the story is the brunt and everything else revolves around it. Add proficient direction, excellent performances of the cast (especially Mr. Hennie), "familiar" camera angles and shots, fine choice of music and everything else that makes a really good movie to watch, and you'll get something like this one. And it comes from Norway, the country that really knows how to produce an excellent movie (comedies, dramas, crime ... anything).
This movie does start rather slow but very soon catches up speed and with all of the twists and turns keeps your attention every second, sort of drowning you into the story, characters, taking sides and expectations. It leaves you with a certain satisfaction that you've just watched it and that is what makes a movie good. Highly recommended.