Me and my boyfriend met on one (plenty of fish) and we have been together 18 months and honestly I dont know what id do without him. I liked it since I was quite shy it was an easy way to meet people.
my only tip is see what it is that they want quite early on. the good thing about that website is on your profile you can select what you want (a fling, a relationship etc) so its easy to see.
But heck yeah girl you go for it!