Well, I guess it depends on how you define the word legit. It is not an agency. It is an advertising outlet. Some of the chicas are good; some are not so good. The casas de cita -- probably what we would call cat houses -- advertise extensively here (Las Patriotas, Las Colegias Exxtremas). If you have specific wants or needs, you should be very careful about outlining them and getting an agreement beforehand. However, this may be difficult if your Spanish is limited.
Personally, I've had some fun times with some of the independent chicas who advertise here. But it is very hit-'n'-miss, so to speak. But if you are into adventures and don't necessarily care how the date turns out (providing you ultimately get what you were looking for), then this is a great starting point. ุComo es su espaูol, Seูor?