Excellent movie. Well cast, superb acting. An original plot with excellent character and relationship development.
Cautionary advice to family viewing. It is definitely PG13 - think long and hard before letting younger viewers watch this movie. As a parent of kids in and around 13, I would not want them to see a few of the scenes that are quite disturbing. Plus the dark humour would take quite a bit of pausing the movie to explain.
Older teens, yes - an excellent movie to promote discussion of the atrocities of war.