I've been using them for a few months, I might write a review of my experiences for another site, and could post it here.
My biggest recommendation.
Use it as a SUPPLEMENTAL tool to meet women. Don't take things personally. Stay focused on your main life goals. But do make a great profile.
Women have so many options, I've had some pretty attractive women message me first, and I felt like the conversation went really good and was fun, but we never went out, in fact, i could never get the number.
I always figured they just got hit up by 150 other guys.
Realistically, I think the sites are probably a lot of women competing for 5% of the actual guys, the highest quality men
But it's worth a shot . I got some dates with some pretty cool and attractive women.