I was surprised by the amount of negative reviews - I suppose it depends on what you expect to see. It's a quiet film where the tension between characters doesn't let each of them bury the things they have had to do to survive. Chris Pine takes on the role of brutal alpha male - and the other characters love and hate him for it. He makes the decisions that no one wants to make, but as the journey develops the cracks begin to show and as a viewer, I felt far more connected to the desperation you would feel in that situation.
I love eye-candy films and roller coaster rides, but occasionally its fantastic to stumble onto something like this that just creeps up on you and takes over the couch. Depressingly brilliant!