I have been doing POF for the past month. In order to be really successful from it, it almost needs to be a hobby lol. You come up with the perfect ice breaker opener, spam out a TON of girls. I started getting a lot of responses.
If you are looking for the girl of your dreams, POF is not the answer lol.
Honestly you should use it for entertainment purposes, and practice talking with women, working your "texting game" or w.e. other then that. Go meet women in person. It is much more promising.
99.9% of the women on that site are on there for a reason..DAMAGED GOODS!