I suppose if your experience is limited to veteran level on Call of Duty or Michael Bay films then this probably isn't your cup of tea.
I saw this film in Brighton recently, and was very impressed given the limited budget. Combat is 98% boredom and 2% sheer terror, and this film didn't try to make out that war is anything other than that, along with soldiers bitching about their kit and conditions, and the inevitable stress and tension between fighting men, particularly when the enemy is elusive and rarely clearly seen.
Judging by other reviews, one might be forgiven for thinking that war is an entertainment franchise. Nice to see a war film directed by a former soldier with a grounding in the realities of combat, rather than some fist-pumping gung-ho CGI-fest directed by a Hollywood celebrity with a massive budget and zero experience of the realities of war.
Something of an antidote to the usual war film cheerleading, and not one to appeal to MMRPG playing geeks.