I used Solomon Exam Prep for both the Series 7 and the 66 which I took within a couple of months of each other. I smoked both tests with an 85% and an 88%. Well above the passing score. The books have just enough humor to keep things interesting and the practice tests and quizzes are phenomenal. If you want to get the most out of these programs pound out as many practice test as you can.
Your test simulator was invaluable. I took 1500 test questions before the real exam (Series 6). Scored an 89, thanks to your product.