I payed $24 for my Gleim test prep book. I went through and read every question and then highlighted the correct answer. Then simply go back through the book again and keep memorizing the correct answer. 2 days of 5 hour a day studying and I took my test. 96% and it only cost me $80 at my local FBO. How much is your time worth to you. I got paid $85 a day to study for my test (vs paying $250 wasteful dollars at ATP). ALL ATPs is easier on your mind but harder on your wallet.