Best AP Chem Study Resource?

Which of these resources is the best to study from? And which should I spend more time with?

  • PR 2015
  • General Chemistry by Hill, Petrucci, McCreary, and Perry (textbook)
  • 5 steps to a 5: 500 AP Chem Questions to know (ton of MC)
  • Kaplan AP Chem 2014-2015
  • 5 steps to a 5 review 2012-2013
  • Barron's AP Chem flash cards

I heard that Kaplan and Princeton review are the best study books-- don’t recommend Barron’s, as their ap chem books have been known to have incorrect answers.

@kalefornia Really? I thought Kaplan would be weaker, I’ll spend some time with it, thanks!