I haven't seen or used other study materials so I cannot make any comparisons but this one came highly recommended and I went for it. I went through the program twice and entered into the exam feeling calm and confident. The study material and taking strategies were on point and the other little helpful suggestions like taking a break and refueling with fruit and juice mid test were brilliant. I am thrilled that this study program was suggested to me. Thank you, thank you, thank you, Amanda and TDC team!