I have been switching between Kaplan & EK for the last few weeks... EK is 1/3 the amount of pages (compared to Kaplan), but has no flow or detailed explanations. If you know your stuff and want a quick read, EK is the way to go. Otherwise, I personally think Kaplan is the way to go if you have time to read and need more review. Kaplan is put together well and has great flow and examples. Also, EK seemed to be missing a few AAMC foundational concepts which I noticed so far. Therefore, that pushed me over the edge with EK and pushed me to focus on Kaplan.