Don't expect much, it may be plenty of fish, but not many keepers. For the most part, its people who've pretty much given up on trying. I may be one of the lucky ones who actually found someone on there, but it took over a year to find this person, and it turned out we both pretty much tired of the mainstream social scene. Apparently, if you want to be noticed, you have to pay on the site. It has results, but its time consuming, and frustrating.
Pros
free site, if you're really looking, theres some useful tips and guides.
Cons
like i said, it's mostly full of those who've given up on trying.