This is a great movie, but there is something a bit off about it. It's hard to describe, but somehow it feels a bit empty, like it focuses all of its attention on details while ignoring the big picture. You can deduce it, but it's as if a large chunk of the story is being ignored.
Nonetheless, the cinematography is incredible, the acting and cast are absolutely top-notch (Manon Cotillard in particular is brilliant), the script and writing are excellent and the general atmosphere, style and themes are fascinating. It's also pretty interesting to see a film entirely shot digitally, instead of on film. It gives it a very unique look, and captures everything in sharper detail.
In a sentence:
It's a bit of a shame that it isn't the masterpiece that it could have been, but it's still definitely not a movie you should miss, and is a top-notch production.