PVT: From my experience, The PVT is accurate. This is actually my third attempt (75Q). With my first (210 Q) and second attempt (165 Q). When I tried to do the PVT (this was after my 1st and 2nd NCLEX exam) it went directly to the CC page. But this time, I got the good pop-up. 48 hours later, I did the quick result and it says "PASS".
How i pass the NCLEX: As for my studying, I only used the Saunders comprehensive book and the other blue book (Saunders all Multiple Choice Questions). This didn't help me much since I am only studying basely on the content and I felt that I was not mastering enough any critical thinking skills. Before I took the exam the third time, I decided to take Kaplan and studied for two months, at least 3 hours a day. These are my results: Diagnostic- 63%, QT1-67% QT2-76% QT3-65% QT4-74% QT5-69% QT6-70% QT7-65% Readiness-63%. (Based on the result on my readiness exam the probability of passing is 96%). QBank (which I did 1300+Q, at least 100 Q a day)- 56%. For content I preferred the Saunders compared to Kaplan but for practicing NCLEX type of Questions, I prefer the questions from Kaplan. Also from my experience, the Decision Tree used in Kaplan was effective. I actually used it when I was answering the questions. For example, would I assess first or implement, the use of MASLOW or ABC, physical vs. psychosocial, clean vs. dirty, etc. But in order to master the Decision Tree I suggest being knowledgeable of the nursing content first. I also used La Charity book to practice answering prio and delegation questions. I recommend this book and it is very useful. Lastly, I'm a religious person and I believe in God. So every time a question pops out, I pray that I get it right.
So if you fail the first time, second, third, or fourth and so on, don't be discourage and do not give up. With hard work and faith, I know you can do it!