I thought it was strange to see this movie pop up in the local art house theatre. After seeing it, I understand why.
First off, it is phenomenal... but it is a "small, creator's vision" type of experience. It is basically a documentary. No fluff, no Hollywood bullshit, no character arc's, or scenes back home to try and humanize it all. It is an evening and a day in the life of a Iraq war platoon. It raw, its brutal, and it is as real as "warfare" gets.
It is worth seeing and supporting if you can.