Wow! Not sure if it was having no expectations or what but this movie was awesome. This was what psychological thrillers should be like. It was totally Single White Female like as you would think from the trailer but then there were twists and turns on the good characters that made you totally unsure who to root for anymore. It was paced perfectly and any time that it started to feel too formula they curved it a bit and got you rehooked. There were 3-4 points in the movie where the whole theater jumped out of their seats. And the movie avoided the pretty little bow ending that most movies like this do. As if I didn't enjoy this movie enough, I had no idea that it was written and directed by Joel Edgerton, the actor playing the weird old friend. That just makes this movie that much more impressive.
I would definitely recommend poeple checking this movie out. Not that you really can since it was opened so limited, but that is a shame because this is one of the better all around movies to come out this year.