It is a full blown virtual world with many other features.
PROS: It is the only site I know where the women actually outnumber the guys!
Simply ignore the paying features (you don't have to enter any credit card details).
PROS: The girls on this site are really easy, and they are there for one reason only.
CONS: requires you to register and install a client ; extremely steep learning curve ; no webcam feature so you will have to bounce the girls to your messenger ; most of the women seem to be bored housewifes, so they're not always much to look at!