I used QAC for an air legislation course and at that time they had several other courses running. No one was complaining about the quality of instruction and my experience of QAC was they were good.
QAC have training aids, such as bits off engines and etc, not all organisations have this stuff. I have done three helicopter courses in Brisbane with other organisations and although the instructors were good, there was very few bits of aircraft or engine to look at. In my opinion it helps to see bits 'in the flesh'.
As you probably know its in a quieter part of Brisbane, the city and people are pleasant.