Compounding for Naple

Does anyone have the 2017 RXprep book? Do you think that their new compounding section is comprehensive? Anyone who has taken the Naplex recently who has used the 2017 RXprep book, what is your opinion?
My Naplex is in April, I have the 2016 RXprep book and do not want to purchase their 2017 edition. Any other resources that I can use for compounding?
Thanks!