Agreed with DWW, you really do need to know the subject of POF, and I certainly wasn't advocating just learning feedback answers, I never would for any subject.
But I found this to be the subject where using the feedback to consolidate your theory came into it's own more than any other. This subject (IMHO) coud be so tricky in as much as trying to figure out exactly what the examiner is after (surely not, not the JAA ?!) that the feedback was invaluable in that respect.
Believe me, I'm not a great proponent of feedback as the MAIN basis on which to tackle the exams, (although it has its place), and this case I found it to be an invaluable aid.