I downloaded it too and I thought it was good.. its kind of funny the way the director try to twist your mind...
The first half of the film the reality behind what the man was doing, wasn't really shown... and you almost didn't want him to get caught... but then they completely flipped the script the second half of film.. showing the errors and the carnage of his ways...
The ending however just showed how messed the World is... I won't spoil it for those who haven't watched it yet.
I can see the reason why it did do so well in America