I've worked/flown with dozens of flying schools in Australia and believe Aerospace provides one of the higher training standards in Australian GA. They're not perfect - some aircraft are a bit old, some instructors are better than others, but standards are overall higher than most BK schools. They have an outstanding record of progression for staff and students to major airlines; doubt any flying school at BK would come close.
Shop around and make sure you're happy with who you choose, but don't discount AA on the basis of PPRUNE vitriol - I recognise one poster above as an instructor who was asked to move on for lack of flying and instructional ability.