They charge quite a lot. I can't remember how much exactly; you have to actually go in person for her to quote the prices. I think it was over $80 per lesson or something (can't remember, probably went up, but then again most tutoring colleges these days are around that price). The annoying thing that made me avoid them was also how they would force you to pay for every one of their lessons (so say, she wouldn't allow me to start at some Term/Week even though I'd already learnt that stuff before, but would have to relearn it all from her), and that would mean my being put in a room with a video recording of her talking as a substitute for those lessons, but still paying full price for all those previous lessons.
I don't know - to be honest I have never gone to her. Maybe she changed her policy. It was hard enough to find (it's in the 2nd storey of some dodgy back alley apartment in Eastwood, which if you didn't know about already, you would think you were intruding into someone's home).
Even though I decided never to go, I can tell you that a few people I know went there and did quite well in their HSC. I shall try find my friend and get him to post a review if he wants.