Paranormal Activity Movie

For those of you who like 'Hollywood' movies about the paranormal this one is for you!
As far as I saw on the trailer (since this movie is not yet available here where I live) it reminds me Blair Witch Project. Blair Witch was a big hit because of the "originality" (not that much, movies of this type existed long ago) but this movie is starting to be a big hit also, and the reviews about it seem very good. Almost every person that watched this movie refer to it as a VERY scary.
Here I include two trailers and one review: