American Mary is a sleek and sexy film that is unpredictable and fairly unique. The story is dark, daring and entertaining, and solid production gives it clean and smooth look. It's body modification theme is edgy yet tasteful, and at times quite thought provoking. Katherine Isobelle plays the lead brilliantly; cold and brutal, but at the same time, empowering and elegant.
As for Faults, well, American Mary is a great film, but it peaks two-thirds of the way in, and by comparison it's ending feels a little timid and noncommittal.
Now, this is a bit over critical on my part, and it's only a minor flaw, but one that stands out as there are so few in the film. It's the cameo from the Soska sisters, I get it, I do, If I made a horror film, I'd want to be in it too, but this just wasn't the parts for them. Although I suspect they probably wrote it with themselves in mind. It's only a short scene but one with so much potential. The Soska sisters play big characters in a scene that could have been wonderfully unsettling, but instead its a bit flat and clumsy. The girls just didn't have the physical presence or screen confidence required to fill out the roles.
American Mary would have been excellent if it wasn't hindered by a few minor flaws and a weak ending. Overall, a delicate, but by no means tame, addition to the torture porn sub-genre. This film could easily become a horror cult classic, and deservingly so. I will be interested to see what the Soska sisters do next.