5 steps to a 5 or Princeton Review: AP World History

Hello,
This upcoming school year I will be taking my first ap, AP world history. My teacher just sent the summer assignment along with study guide recommendations which were 5 steps to a 5 and PR. All of my friends who have taken AP World all have used 5STA5 over PR or atleast like it better. So based on this I preordered the 2016 5STA5 AP World book but after researching I’m finding that a large majority prefers PR or recommend using PR with 5STA5: so based on this should I cancel the 5STA5 order and order PR or just buy both?