I will recommend the rxprep book not so much the qbanks!
I failed naplex at my first attempt I was doing the qbanks more that reading the book !
I j this time I decided to ditch the qbanks and focus on the book 2018 version ( biostats are well explained there than the 2017 for the other topics both versions are equal) and I passed!!!
I went through this website read almost all tips on the naplex and found the notes of one kind guy who help a lot ( thank you Tahhur)
I also bought a flashcard (200) who really are like the case profile on the exam you need to work them so you will be comfortable during the exam
calculations forget the 120 questions turning around here the maths on rxprep are fine (except the biostat chapter for me too weak) I have found online good website where you can practice more biostats
I prayed God to help me because it is a nerve wrecking exam only by the grace of God I was able to pull through..i have graduated a looong time ago!
I hope this help!