The beginning was really Ok, watchable, I didn't know what to expect. The middle plot was pretty bad, some scenes didn't make sense, how people can survive so long in such cold area, some scenes were predictable. Ending was really nice, turned down everything upside down and raised mark from 5 to 6. Third favourite movie of this year so far. I would recommend to watch this film but it won't be something special just average action/horror movie.