I had purchased a couple other programs (Grossman, and Berkeley Training & Associates). The material was just so overwhelming and confusing to me. I thought to myself that there is no way I would ever pass, so I put it off for 12 years. Yes, 12 years! Then some co-workers mentioned TDC and I looked into it. TDC material was very organized and seemed more simplified. I loved that I didn't feel like I had to study every single day since I am a working mother with 3 kids. Thank you TDC!!!