The fact that people have not learned that they can not see a Norwegian movie with high expectations is incredible. If you come expecting something good, or great, you should go for a different movie. That said.
As for the acting; there was little to no passion shown by the actors. This however portrays well the environment the "gangsters" come from as well as pre-dating the show from todays date. Poor acting, but it worked in a very weird way.
The retro view on things was quite nice and it really made the experience of the movie into something that I enjoyed.
The story is simple. Gangster, drugs and killing. During most of the film I was having flashbacks from "Menace II Society".
All in all, it felt like reproduction of most gangster movies, put into a new cultural setting and downsizing the actors and cinematography. Decent movie, not great, but over my expectations.