I can't say much as I couldn't quite put my finger on it in the theater (it's a second viewing kind-of movie) but it seemed mostly well done. Something I remember very strongly was that the soundtrack was a very interesting choice and also quite successfully integrated into the film. There was also one part in the movie I was completely blown away by that still sticks around in my mind. As the protagonist attempted entry to the building getting shelled that had the woman with her baby within, I realized half-way through all the shrapnel that it was all one long shot following the character; it completely slipped under my nose until I noticed blood spots staying on the camera. That was excellent. I found it a little unbelievable the character would risk his life in such a dangerous attempt, but the camera made it terribly easy to suspend my disbelief.
IMDB has it ranked fairly highly, and I'd completely agree with that number out of 10, but on account of some little things that, again, I can't quite put my finger on, I'm surprised it did get rated so highly.
Something that might account for why I felt the movie was a little patchy:
-It was a character focused movie in a dystopia I wanted to know more about and am usually given more information about in such movies, especially since they had the spare length for it. You're really told as much about the setting as you are in a present-day set movie, and that furthered the realism of the film, but it made parts of the movie a little off-putting. Example: The dreadlocked nurse's religion seemed wonky, not realistic, since we only saw it from the protagonist's point of view.