In fact I would even give it five stars on the screened rating scale, it's the best horror movie I've seen in a very long time.
However, this did not stop me from finding a (pretty minor) plot hole, and obviously, feeling very accomplished, I want to share it with the world.
In one of the scenes, near the beginning, if you look closely at a T.V in the background you can see that it is playing a commercial for the Dyson Ball vacuum cleaner.
The movie claims to take place in 2006
The dyson ball came out in 2008
Either this is a gaping plot hole, or it turns out the T. V is receiving broadcast from the future, adding another layer to the "paranormal activities".
But it's probably just a minor inconsistency that no one will care about. Still, I feel accomplished.