Feedback from our members...
I have been a member of AdultFolio from the start. I find I get more work through this site than the others as they allow people to see exactly what you do and not just cover it with the term Adult.
I've found this a great site for finding the resources necessary to enhance a portfolio. There are some really helpful people on the site that are able to give great advice and help to both experienced models and those just starting out.