I really had a great experience using Therapist Development Center. TDC doesn't just offer practice tests, mock exams, and quizzes. The program is audio and so you can literally take it on the road. Visual aids are also available to supplement the audio. TDC offers test taking skills and gives you explanations for answers throughout the practice exams. I did not pass the exam last year by 1 point, but I think I would've done so much worse without TDC. I stuck with the program and went through it again step by step. I recommend TDC to anyone that wants something easy to follow and will stick with you throughout the process. I particularly recommend it to those who feel that test taking is not their strength.