I went and saw this yesterday and thought it wasn't half bad. Sure it wasn't Black Hawk Down, Private Ryan, Hurt Locker, etc. but as a gun nut I certainly appreciated seeing a movie where proper weapons handling and tactics are used to illustrate battle scenes.
I would have liked more from the script but the acting was tolerable. I think the first person perspective was cool and it's unfortunate that the gaming world has devalued that camera angle because that is about as close as it will get to seeing what a soldier sees from the stock of his M4.