This movie scored points with me on the basis of mainly what I was looking for: Did I get some good scares out of it? My answer was definitely yes, there were some well thought out places in the movie that were genuinely scare-worthy.
One thing this movie had that others that are "found footage", or whatever you want to call them, that also appealed to me, unlike many other movies of this genre, was that the investigators actually reviewed things caught on camera, whereas several other movies (Paranormal movies come to mind), the people setting up cameras to catch strange occurrences don't bother to review the footage of what happens while they're sleeping, which, oddly enough, is when most activity happens in these types of movies.
This is not really a spoiler, but will make you scratch your head. The ending seems to have just been thrown together and ruined for me what I considered a very decent movie.