I thought that the movie was alright.  It wasn't the best movie nor the worst movie that I've seen.  It had a pretty good plot, knowing it was based off a true story (now I want to look up the true story to see how similar it really is).  

There was one part near the end of the movie where I thought that they were getting a little far fetched but then they brought it back together nicely.

All and all, for a PG-13 horror movie, I thought that it was good.  Most of the time, PG-13 horror movies are so far fetched that all I can do is laugh through the movie.  This movie, on the other hand, actually made me jump a few times.  There were a lot of intense parts.  So, I would recommend seeing the movie.