I found these posts very helpful when I was trying to decide what study materials to buy, so I'm paying it forward! I just passed my AANP exam, it was pretty much what I expected.
I studied for around a month and a half, for around about 1 hour a day. I did all of the practice questions and tests that I had access to (around 4000 questions). Leik was my best resource, I read it cover to cover and did all the online questions, it was invaluable. I also did APEAs live review, which was good and helpful however I'm not sure if it was worth the price tag. I also got MyQBank, both management and assessment. Both were helpful but if money is tight just get management. I also got Exam Edge 5 Practice exams which were not worth it at all, don't waste your money. I did get the APEA predicter exam and got a 77% which helped so much with my confidence level. The predicter was harder then the actual test.
Overall, if you did well in school you shouldn't have to study that much for this, a month and a half actually felt like too long for me. Get the predicter exam when you feel ready, and get Leik's book. Good luck!