I started there last year for HSC Standard English and they really helped me a lot! I was ranked in the middle of the class, just an average and now I've shot up to 4th. You get to meet students who go to both private/public schools and the tutors are really nice and great there. What was a huge plus was their mock trials (included in the fees), where they make you sit the paper before the trials and before the HSC so you get a head start before most people. Plus they also offer mock trial exams for people who do Business, Maths, Modern History, etc. Also their online marking is fantastic, where they have a HSC marker mark your essays and it has to be returned in 72 hours or you get a free marking. Ferg himself is really awesome!
Hope this helped!