Okay let's get this out of the way, what you are looking at isn't the next 2001 a space odyssey, it isn't a thought provoking masterpiece of cinema. You weren't looking for that.
It is however, a well directed, brutal revenge thriller which packs a punch. More in the vein of the extreme french horrors than cheesy gore-fests like Saw, they aren't even in the same league. The acting is good, as are the visuals + music, it's a mature film.
The thugs/rapists are fairly typical, but enough is shown of them before the quite uncomfortable rape scene ensues that you will truly hate them afterwards. Worth noting this scene will be hard to watch for some and truly justifies the events that follow. The main character is left feeling numb, and a brutal (and creative) revenge follows as the "thugs" try to pick up the pieces.
A harsh, and satisfying revenge film, well worth getting if you are a fan of films such as ; Martyrs, Switchblade Romance, Irreversible, Frontiers etc. Don't expect it to do well critically or sit well with the masses, these films have more "cult" followings and never do. I wouldn't show this to the family and expect them to be impressed.