I know a person who met someone half his age; she moved in within a month and they were married in less than 100 days.
I have not heard great things about POF and never used it.
I met my husband on Lavalife.... I had to kiss a few frogs and it cost me a bit of $$ but it was worth it.
I had did have a pic posted and he just confirmed he would not have met me it I hadn't had one posted.
... Funny coming from the guy who used a pic that was grainy and a few years old.....