I have taken it three times. Go ahead and study the practice tests. However, keep in mind; the whole idea is that these tests are timed. You are only graded on the questions that you answer, and of those answers, the ones that are correct. If you find yourself spending any time on a question, move on to the next. When you complete the test, use your time you have left to attempt the questions you skipped. That is the main problem people have taking these tests. You are not penalized for the questions you do not attempt to answer. I passed all three, never studied. Studying for these tests can make you apprehensive, worried, and nervous. Now, I am not suggesting that you do not look into what type of questions there are, but don't worry about having to spend so much time performing practice tests. Just a hint. Good Luck!