NCLEX study books... Saunders vs. Princeton

[WSU_Ally_RN, BSN, RN]

I'm signed up for an online NCLEX review class that my school offers next quarter. The book we are required to use, since assignments come from it, is the Princeton book called Cracking the NCLEX-RN 7th edition. Has anyone used this book??? Is it any good?? How does it compare to the Saunders book? I already own Saunders, and don't want to purchase/use another book if it's not as good.... If it's not, I'm considering dropping the class... Thanks for any replies!! :)