I'm preparing for the MCAT and so far, I have the Kaplan books...but I've seen most people here praising EK and I'm thinking to buy those as well. Just a question though-which one is better? The EK 1001 questions or the actual EK book?
They're different. EK 1001 is all problems, the EK content books are content review, some questions, and a 30 minute exam for each chapter. If you're going to use EK + Kaplan (and not TBR) and you are only going to get either EK content or EK 1001, you should get EK content.
Yes, very brief explanations. EK content books are good because they have some questions in the chapter as well as 30 minute practice exams that are a combination of passages and discretes (like the real MCAT). I think the EK 30 minute exams are a much better resource than the EK 1001.