The Zahn program helps to filter out some of the extraneous information and forces you to focus on the bigger picture. Having the bigger picture helps to digest all of the content that is thrown at you. There is a lot of material that is tested that isn't covered in detail in the Zahn program, but by using the knowledge you have and leveraging effective test-taking tips, you are able to deduce the answer or at least, feel confident about your answer. By doing what is asked of you and following the recommended study schedule, you give yourself adequate time to prepare yet also feel confident going into the exam. Thru the Zahn program I was able to commit just the right amount of time and pass the exam on my first attempt.