I'm also using both Berkeley Review and EK and I like Berkeley Review better. However, I think it really depends on how you like to study and how comfortable you are with the material. I think Berkeley Review is more oriented toward people who like to learn conceptually, wheras EK (although somewhat conceptual) skims over some of the less important concepts that you can get by with just memorizing, rather than fully understanding. If you really need someone to teach you the material (for example, I had terrible gen chem and physics profs and never truely learned the concepts despite getting A's) then I'd go with TBR. EK is better as a refresher. I will warn you though, that if you go through all of TBR, it'll take you FOREVER. Keep that in mind if you don't have much time or aren't comfortable skipping over things.... Hope that helps. And obviously, I haven't taken the MCAT yet so my opinion might change.
