Follows the mold of every single found footage stalker movie made just a little more oversimplified is all.
With a 30 minute plot (40 at the most) stretched out to 81 minutes and most scenes mainly being day to day scenes of the family doing regular things at home this movie is far more boring than it is disturbing.
The acting is... okay I guess, the family does act kind of like a family does. The stalker we only see from time to time and he's weird I guess, which makes sense.
I just looked at the credits and saw that Amy Smart was in it which surprised me, she was in it in retrospect but you couldn't really see it was here because she was only in one scene sitting by a table with the "hidden camera" being very far away.
So yeah if she is what makes you want to watch this don't bother. But then there is no real reason to bother watching this period.