Great movie - but only for patient people.
It's like one of these old thrillers - slow to start, slow to build tension, not filled with unnecessary action, not trying to show fireworks every minute (and not ending with some moronic "truth about life").
It's simply a realistic investigation !
When so many modern movies promise much and disappoint much, this one does not show off but is perfectly crafted.
It's filled with emotions - real but subtle emotions, not the usual overplayed emotions we see in thrillers (it makes sense, they are spies after all).
It's dense if you pay attention (but it's empty if you expect the usual gun firing, running and screaming !).
The music, the costumes, everything just feels right.
Those seeing emptiness and lack of emotions, well... Either they didn't look good, either they have a short attention span, sorry to say !
But you've been warned: watch this movie when you're fully awake, it's not a Saturday night flick you watch while talking on the phone and eating popcorn.
It's a movie you watch carefully, because it shows you something very rare in thriller movies : subtlety.