Have you tried Facebook ads?

We all know how popular Facebook is all over the world. They also bought facebook ads to promote website and programs. So have you tried them? I heard they are expensive, is it true?

I'm interested in it but I haven't tried it simply because I don't have a credit card.Some said it would become a proftable method just like the adwords at the beginning.It's even better than adwords,you can set gender,age and more when you are creating your ad.

Im interested to see how face book ads convert money for us.