Hi,
That’s a tough one. No one can guarantee you for sure. If you allow me to answer this personally, and not on the behalf of Mr. Cornelius or OSP International, I would say that my gut feeling is that, if you are getting above 75% on the exam simulator consistently, then you stand a very good chance of clearing your PMP exam on your next attempt. Many people tell us that the exam simulator questions are more challenging than the real PMP exam.
However, please don't assess yourself on simulator quizzes. Go for the full-fledged exams and see if you are scoring over 75%. A full 200-question exam test not only your concepts, but your exam temperament and time management as well.
Again, this is my personal opinion.
Warm regards,
Khurram Hussain, PMP, CSSBB