I took another program before this and failed the first test by 1 point. I heard of this program through my colleagues and I am glad I made the investment. The TDC program is phenomenal, engaging, thought provoking and the practice exams were very helpful and similar to the real exam. I love the use of audio, print and online; it creates a well balanced study program. I felt so confident during the exam; it was like a new me. Thanks TDC for such an excellent study guide. I can’t wait to begin studying for the second exam with TDC.