I took the same predictor test and I received a 98%. I graduated from my program in December 2011 and I just took and passed my NCLEX-PN in mid March with very little studying. Actually, I used old ATI codes to take the comprehensive practice test a few times and that is about it. Even though I passed, I strongly suggest studying. If only for peace of mind. My NCLEX shut off at 85 (the minimum) after a battery of Maternal/Child questions (not my strongest suit) and I was completely 100% positive I failed. I did the same thing as 9livesRN. I read the question, read it again, picked an answer and never looked back. It's the only way you wont be there for 5 hours. But then again being out in an hour also contributed to my sense of doom.... Oh and btw, I loved ATI. It helped me prepare for boards better than anything else. The format is the same and the priority questions really give you a sense of what to expect. Just my opinion.