As Thorsten says, there are a few agencies with that name. Do you have a web link? What was their selection process like? If it was very rigorous it bodes well. If it was cursory, it does not.
I also would look with grave suspicion on an agency charging you to join. They either feel you have potential and will make money from you, in which case they shouldn't charge, or they're just trying to pad their books so they look like they have lots of models available.
There seem to be a lot of new agencies popping up lately.
Did they mention who the "top photographer" is?
Also check anything you sign to see if they have exclusive rights to booking you, or even (gods forbid) they get a cut of fees you earn that were NOT booked through them.