The film is interesting and powerful, albeit depressing. No idea how the director got access to give us such a candid look, but this is a dark side of the world you won't see anywhere else. The subject is self explanatory, if you're at all interested about the lives of these women in Thailand, Bangladesh, and Mexico then you should experience this.
My one critique is thematically, the movie is about prostitution in abject poverty, not prostitution as a "job", but does not make any distinction. The prostitutes in Bangladesh and Mexico he shows were in absolutely horrifying conditions - they were forced into it, threatened if they tried to leave, and barely paying for food. Whereas in Amsterdam, Germany, and even many in Bangkok treat it as an occupational choice. They can get other jobs, but choose to do this. Those are two VERY different circumstances that can have very different effects on people physically and emotionally.
That would be my critique to keep in mind while watching. The movie is not so much a commentary on the evils of prostitution or even the lives of prostitutes, as it is delving into the darkest depth of what desperate conditions can bring.
