Hello John Doe,
I utilized the Human Kinetics resources in preparation for the CSCS exam and found the resources to be very helpful.
I am assuming that you have earned a four-year degree because you are are seeking to earn this credential.
I found the exam to be challenging and needed very minute to complete the exam when I took it in 2008. I passed the exam on the first attempt, however, I prepared well.
All the best to you.