For some joining academy proves good but for some academy is not that necessary..One of my friends brother is a CSP and according to her he prepared from some academy in lahore.Whereas I've passed my CSS in first attempt alhamdullilah without joining any academy..Though I dont have a tag of CSP yet but I think Its a '' You can do it on your own '' kind of thing..Academies are not necessary.& one thing..dont expect any thing from those who sell knowledge.They only luv your money.

P.S. This forum is more than enough for CSS preparation.