To be honest, we think you should get both (and not because we just like selling stuff!). Many educators will tell you information is best retained when presented in different ways over a period of time, and while there will be overlapping concepts/material shared between the study guide and flashcards, the information is presented in two completely different formats. The study guide is a great reference to help you prepare for the exam and works well for concentrated blocks of time from 15-90 minutes of study. The flashcards, in contrast, are quick tidbits of information you can review anywhere with even just a few free minutes. We believe students who use both our study guides and flashcards together have an advantage over students who simply use one or the other. If you want both, our Mometrix online courses include material from our study guides, flashcards, and other study tools bundled together at a discounted price.