Let's be honest: Many Icelandic movies are definitely "acquired taste", and are not of much interest to most people unless they're into Iceland.
That is NOT the case with this movie. It's an awesome story, with incredible characters, and you don't need to know anything about Iceland or even be interested in Iceland to get it. It's based on a TV series, but I hadn't seen it before and didn't need to. I'm sure I probably missed some jokes, but it really wasn't a problem. I just read a description of the movie before reading it, which helped, but that's not even necessary. Also, the ending was great and really satisfying.
As cliché as it sounds, this movie made me laugh and made me cry. I hope it gets sold in international markets because it's a really, really good standard bearer for Icelandic cinema. I don't often give out 10s, but this movie really deserved it.
