This movie deserves allot of praise, simply for how well it plays on the Norwegian cultural memes. Visually it is also quite good, as it show of the landscapes and places in which the folklore of trolls actually arose, and of course spices it with lovely computer graphics when needed. The graphics merge very well with the mockumentary style, and the movie itself falls between categories, mixing comedy, action and fake amateur documentary style.
The bad sides are simply that it lacks a bit of flow at times, and of course, the biggest drawback of them all, one which only applies for foreigners: it's a very very Norwegian story. I saw it with my Portuguese girlfriend, and she thought it was okay. I briefed her on our fairy tales before seeing it, but jokes like the three sheep on the bridge are hard to catch, or appreciate, without being marinated in our culture for a long time. One other issue for me was actually the cameo appearance of two Norwegian comedians, something which slightly spoils the illusion. Others might disagree.
I suspect this movie would be a seven or six of ten if I was not Norwegian, simply for its concepts, but because it is so rich to me, I give it a ten despite its flaws. You'll love this movie for its visual side, and some of the drama is also great. For Norwegians, this is a must see. For everyone else, it might be exotic and neat, and offer you some relief from classical Hollywood monster depictions.
And should you get curious after seeing it, Google for "Theodor Kittelsen", and "Asbjornsen and Moe" (: Enjoy!
