The destroyer just like any other resources can get complicated, if you dont have a solid foundation in that section. Going over Kaplan and Destroyer, I realized I has weak points on sections, so I went back to my textbooks to get a better understanding and then redid the questions. Achiever, Topscore, Destroyer, Kaplan questions, Crack DAT should all be used after knowing the materials to be used as practice and more practice!! With Exam Krackers, I began mostly with the reading section. Since the MCAT and DAT are two different exams, and Exam Krackers is focused on the MCAT, however they do focus on mostly the same topics so I don't see why not? The questions can give you more practice if you choose to use it.