I liked the OAT cd-roms very much and used them extensively - as well as the mock exams on each cd.
However, I did read the books too to ensure that I had a good background knowledge of each subject before I started. The cd-roms on their own might be enough, but it would smack of studying to pass an exam rather than understand a subject.
I didn't buy the PPL confuser as a matter of principle - I needed to become less confused, rather than more.
