Well, like many folks, I was anxious about taking this test. Initially I thought I must already know enough from my Master's program (and 18 months of working at an agency with clients). Money was tight and I thought I could figure out a way to study using free online examples. In the end, I heeded the advice of my peers and paid for the TDC study materials. After the first 30 question quiz I quickly realized I need some serious brushing up. Thank you for your thoroughness, attention to detail and all around helpful cheerleading. I was pretty discouraged after my my second full practice exam, but inspired to double down and read/listen to everything you put into this study guide. Apparently it paid off-the actual test was STILL harder than I expected, but I leaned into it, utilized your rationales, heard your 'voice' and PASSED! Guess that is the best testimonial.