Hi! I am using EK for Biology and Organic Chemistry. I am an engineering major who has barely taken any biology classes (1 intro level physiology class + 1 yr ochem although also did some AP Bio in HS) so I was re-learning all the molecular biology and all the human anatomy. I think content review especially for the MCAT is very important since the test seems to cover many topics superficially so I would definitely at least pick up a review book from Kaplan, PR, etc. In terms of the EK book, I am a big fan of the biology book because I think it is extremely well-written, has a broad range of interesting passages and most importantly help you with MCAT-style problem solving. Even though it is my first time learning much of the material, I find that the questions I get wrong are usually not content-based but focus on logic and utilizing information from the passage. In this respect, more practice is great. Also, the passages tend to give you more background information on many topics and sometimes it helps you later (eg. remembering a random detail from a passage that gets you a discrete question or helps you eliminate a choice). The explanations are well-written although sometimes it gives you very specific information that sometimes I doubt will actually be tested on the MCAT. For example, ribosome subunit size in Svedberg units in prokaryote and eukaryote ribosomes.
EK Organic Chemistry, on the other hand, could use work. I am not a big fan of this book. It is organized based on topic but the questions are often too basic and build on each other. For example, it will reuse the same answer choices for several questions. The questions are not anything like the real MCAT questions, which tend to be more experiment-based and often much harder. (This actually pertains to EK Biology too, which also lacks of experiment-based questions). Although I am still working through EKOrganic sometimes I feel like it is just a waste of time.
