Rob Avery's stuff is great but you can't go past the AFT material. Even the wording is the same as the exam so you don't spend time trying to decipher CASA"s version of the English language.
Might be more expensive but the exam's at $150 a go (well they were when I did them) you don't have to fail too many before it all adds up to the same.
Just my 2 cents worth
