I've tried POF, OKCupid and eharmony, basically you get more quality women with the latter two, but even okc kind of sucks, since it's free you still have to compete, but at least if give you a match % and whatnot. I've met girls from okcupid and eharmony, eharm is the way better option if you are willing to fork out some $... I think POF sucks unless you are a very good lookin dude, good physique, etc. but I imagine the quality of women is not good.