i've bought kaplan (series books), berkeley review, examcrackers, kaplan premier, princeton (cracking the mcat - the single book).
SINGLE SOURCE undisputed king: berkeley review
and those kaplan books - no offense - suck unless you couple them with kaplan's quizzes. Thats 90 percent of what they are good for and those quizzes are decent superficial coverage. Then you take the topical tests, as well as the Kaplan FL's, etc - now Kaplan's MCAT review starts working for you and getting you more intimate with the MCAT (but you have to put in the work). IMO, standalone those books are the most useless resources.
if your talking multiple sources (which u aren't asking for), then it becomes debatable what the best combo of resources are. I'd say if you combo a review course (in depth ), with EK (quick review), and wikipedia that is probably the best option. But that all depends what type of a learner you are. Is it the most cost effective option? Prolly not unless its smartwood or something.
Bottom line: If your budget is under 500, go with the whole berkeley review set and I'd throw in another 100 to get EK. If affordability is an issue skip BK bio. If you insist on only one resource, just BK the whole thing.
