the reviews on this are actually pretty good, in general. its a norwegian film, & troll folklore is big in norway, historically. i guess the trolls in the film are based on real troll mythology.
this is a "lost-film" "mockumentary" style movie, & i've seen it described as a cross between ghostbusters, cloverfield, & district 9. from what i've read, the cgi isnt on the level of district 9, but is solid enough to never detract from the movie or put a halt to your suspension of reality.
78% on rottentomatoes. dry humor. i just ordered this on blu ray on amazon cuz if you pre-order its only $15 (half price) ..good deal, so i'll take the risk.
the trolls are portrayed as being wild animals, & just as dumb. think jurassic park, but with trolls (i've seen that comparison too).