After trying two other mainstream test prep materials, I switched to TDC. As soon as I did, I felt relieved. I was relieved to have a structured plan to use as a guide to breaking down such a daunting task! Also, I was relieved to have a down-to-earth resource to sift through the material for the essentials. With the other material, I was intimidated and overwhelmed by the amount of info I was thinking I needed to learn, and I was putting it off. With TDC, I was encouraged by the first lecture; when I plotted out my study schedule with the sample schedule provided, I felt immediately in control. I do well with a plan! Finally, my audio-visual learning style and the need to "study smarter rather than harder" (we all have lives, and we already went to grad school!) met my needs much better than the other material. Just wish I'd bought this first. Hence my testimonial! Hopefully, my story saves some people some money and stress. PS: I passed on the first go, plowing through the TDC course in 3 weeks.