Wagtendonk is fine if you just want the POF, but it is not compliant enough for the JAA exams, and probably needs updating a bit to cover turbines better. I know a lot of people read it for the exams, but a lot of questions don't come from Wagtendonk.
The AP is not as good as Wagtendonk for POF, and also needs updating, although I can't comment on the weapons chapters!
G