Not bad for what it intends to portray
Regarding the final scene, if one allows it to drive the imagination while overlooking the poor special effects it can be pretty disturbing. The special effects were not convincing and the inclusion of certain factors like a power drill, bolt action rifle, and pure clean white loin clothes made me lose the spell it was trying to cast. It needs a dirtier filthier desolation and despair effect with greater underworld consistency.
Even so, the final scene is pretty grueling.
How about the following scenes portrayed in ultra realistic special effects. (though I may regret the idea later on tonight while all good people are a sleeping dreaming)
http://www.straightblastgym.com/blog/severe-torture-1.jpg
http://www.furiacontralamaquina.com/blog/uploads/cannibalcorpse/butche redAtBirth.jpg
http://z.about.com/d/heavymetal/1/0/D/Y/-/-/severetorture-misanthropic .jpg