I wanted to give the film a 10 but frankly as a documentary, it seems a little too in love with the subject to be objective - this subject certainly requires a wider context.
Here is a very personal fetish/addiction/compulsion for viewing young women being elaborately bound, sexually humiliated and objectified and assuming the appearance of being tortured - it has then been carefully funneled into a form of artistic expression. Neat fact about the internet is that as long as what you've deeply expressed is authentic, someone out there is likely to share your passion.
What I found most satisfying after viewing this film is the very obvious ambivalence that the women feel about their "enthusiastic" and/or "willing" participation in the bdsm scenarios conjured up by Brent. With him, they access profound issues relating to childhood/pubescent trauma and have found an echo in another which promises to normalize feelings which are un-normalize-able. It's a truth which flies under the radar in our desperate-to-be-glib-with-our-addictions culture.
I have always felt uncomfortable in the way that kink.com (a popular descendant of insex.com) and it's family of sites display by the interviews placed at the end of each performance. Performers speak with giddy joy at the delights experienced by one or other aspect of the treatment that they'd received, ignoring the entire subject of HOW such outré experiences would be wished by (or to) anyone. The film doesn't address this aspect other than in passing, but it doesn't hide it either. I am very glad the film exists and hope it does provoke conversation about a very complicated part of our varied communal experience.