Warning: This contain spoilers.

Average movie.
The main problem with this movie is that when the camera is not shaking we are seeing the images in fast motion (some other times the camera was moving normally - theres even 1 scene at the start where he sits on the bed of the dead soldier and i loved the way the camera moved around him - if the rest would of bee filmed like that it would of been awesome). I loved the man who played David, he did a good job and he looks hot. I hated the twist that he was tested on by the military, I would of preferred him being jealous of that man so wanting his life or him being just plain crazy or something like that. The action is not really exciting (would of loved seeing the bullies get more of a beating but i also understand how he could not really do too much there unless kill them 1 by 1 like he did the others).
The directing is very bad. The editing is bad. The acting, cinematography, script and story are average. The special effects, makeup, costumes, sets and music are good.