I am still in the middel of these exams, but so far.. still a good average.
I know there's a lot of people around learning only feedback
even for calculation questions (gennav mass ballance etc). That does not work for me, it saves you a hell of a lot of time just to learn the methods in this case. Make little drawings of compass and polar chart q's.
For all the other questions I use the (expensinve) Bristol to prepare, but I also use this site
http://atpl.sep2jet.com to do some quizzes. Keeps track of results and its free!
Personally I think performance was the most difficult so far, not much questions, so bust 1 4 pointer and your getting low already
and we used the old CAP
Good luck!