flight attendant preparatory course Q and advice?

so,the counselors in my school held a seminar for 1 hour 30 mins for us about flight attendant course which they invited a company named "Inter-Excel Advisory Sendirian Berhad" to explain to us about their course training in preparing mostly 18 years old middle school graduated students for interviews for flight attendants recruitment.they said that for most airlines like Singapore Airlines, Malaysia airlines,Firefly,Tiger Airways, Cathay Pacific, Korean Air, Air Asia, Silk Air and many more will ask them to held interviews for the airlines recruitment.they also said that they'll prepare their students for in-house interview instead while other people for walk-in interview.which at first startled me.and i've read some of the answers in yahoo answer saying that F/A school was just a scam to trick our money.but i'm not sure that is the same thing happening in my country and btw,i lived in Malaysia in a state called Selangor.first,i wanna know how well is this Inter-Excell company ? (whoever that are ex/students from this company are really welcome to answer).second,will the airlines that i'll be interview in teaches,train us the same thing as what the school had taught if we passed the interview and for how long ? third,(opinion) if this inter-excel was a spam,why would my school counselor invited them to came in ? fourth,can somebody from inter-excel students/EX (especially) answer my question please ?