I believe that director Joe Wright has a masterpiece in him somewhere but this wasn't quite it. I enjoyed it, and it made me want the world to have more arty thrillers rather than less but the artiness in this one somehow got in the way of the story. At some point I was still admiring the compositions and not particularly invested in the narrative. Not exactly what you want with a B-movie plot about a super-human pre-teen killing machine.
Next up for Mr. Wright is Anna Karenina, starring everyone who has ever acted in one of his films. Fingers crossed for the masterpiece.