Many-maybe most- point of view movies don't work. "The Blair Witch Project" was total junk ("Neighbours" is more frightening-any episode), ripping off the earlier, lower budget and notably better "The Last Broadcast".
This is one of very few to really work. It is marvellous, brilliantly acted, and incredibly Norwegian. The quality of the effects is great considering the budget (and by comparison with many big budget movies with lousy effects). It's tense and gripping, though never really frightening. Very, very humorous, and fascinating just to follow where the story leads.
A great, different "horror" movie. Highly recommended. Mind, I know people who hate it, so it's a bit marmite. As ever, my opinion is genuine, but it is only my opinion.
Apparently, Hollywood are going to remake it. That has to be dire- watch "Prophecy" to see just how bad it's going to be, although, probably alone, I thought they did improve a little on "Pulse".