I will write a review on this one soon.  I decided to put this one off so I could finish some others, because this one is just plain lame.  I know that it got some really good reviews, but I was simply bored throughout the whole thing.
Bottom line:  This is not really a horror film in my opinion.  It is a slow moving thriller with no real action or interesting twist.  You can see each development way before it actually occurs.  No action plus total predictability makes this one a snoozer!