A very original movie, not quite horror, not quite torture, and only unfulfilled revenge (the rape tape). The costumes were great, and there isn't too much blood.
I felt at first that the body modification element was unjustly portrayed, as the characters displaying it were prostitutes, and Mary was repulsed by the image alteration surgery she performed. However in the second half of the film, Mary is enjoying the lifestyle she gained by entering the community, and those within it do not judge her for not conforming to their taste for alteration, but admire her skill with a scalpel.
I think the revenge element fell flat because the torture victim had to be disposed of before he fulfilled his purpose, and the other man who should also have been punished was dealt with by Billy, who had nothing to do with the rape of Mary.
I was disappointed with the ending. As we watch Mary become darker, indulging her customers' wishes and turning down tame requests, she seems to also want a relationship of some kind with Billy. The way she turned on the blonde stripper was very out of character. Before, it was easy to feel empathy and pity for Mary as the victim of a male-dominated surgery environment, forcing her to abandon her aspirations. This completely justifies the abduction and torment of her rapist. It was very disappointing to see Beatrice and Ruby as victims of male anger when they were previously using their individuality and unique appearance to their own advantage. This film sets up successful females only to tear them down. That's why I was so unhappy with Mary's ending. Perhaps it would have been better to allow her to disappear, with only photos appearing on her website depicting her latest work.