It's also, surprisingly, a thinking person's movie about gun control, yes, gun control. I won't elaborate here except to say that some of the sequences where the police seize people from their homes and gunfire erupts reinforces the image of the gun as a tool of lawlessness as opposed to the decidely American portrayal of guns as enforcers of justice.
I must confess that while I am not an Angelina Jolie fan I felt she did a fantastic job in the lead role. The writing was fantastic and the hand held camera movement was definitely the appropriate choice for portions of the film.