I got really serious about studying once I booked my CAPM exam (3 months in advance). I heard a lot of great things about PrepCast so I purchased it right away. It was a great decision.
The timed quizzes allowed me to test my knowledge in specific topic areas and the exam simulator prepared me for testing my comprehensive knowledge and what it would feel like to sit for a 3 hour exam. It does a fantastic job of confirming your knowledge of the PMBOk. I felt very confident going into the real exam.
Passing the exam was euphoric! I wish everyone the best of luck.