I am glad to share that I passed the PMP exam on my first attempt last Monday, couldn't have imagined passing without using the PrepCast Simulator exams and quizzes! I studied the books on my own and purchased the PrepCast Simulator to help prepare for the exam only to realize that most of my learning was in fact on the PrepCast exams, quizzes, reviewing answers, and their explanation. I highly recommend taking as many exams and quizzes as possible, but also reviewing answers and their reasoning especially for the questions you got wrong.
For the actual exam, I'd advice telling your mind that it is just another PrepCast Simulator exam that you want to do as well as you can on, so that you keep anxiety at bay.
Good Luck! You'll do great!