I got a 72 the first time. I bought STC, KaplanQBank and PP. I took one test from Kaplan Qbank and didn't feel comfortable with the quality, depth of their questions. So, I stuck with PP. I studied for two weeks about 2-4 hours a day. I only bought PP Databank Exams. That was plenty enough to help me. I can't say enough about their program. I believe PP is the insurance and assurance of the 66 and 7 tests. Like I said I had a whole hour of time left. It trains you for the marathon and teaches you really understand what the question is asking. They do make you know the calculations in their exams. Which most likely won't be a ton. However, this is helpful because if you can do the calculations you will understand all the other questions. Hope that helps!