EK spends time giving you tips and tricks to beating the MCAT. I used exam krackers, and with exception of the Verbal section, was really surprised to see how little the actual test was geared toward what they said it would be.
For example, they spend a lot of timetelling you things you should look for on the MCAT - like the answer to any solvent question is "ether".
Well, I didn't use any of their tips or tricks on the actual MCAT, because the MCAT doesn't test tricks. it tests the core basics and intricacies you can only know through mastery of the material.
Does EK help you get there - you bet it does. But does it go about it the right way? Sadly no.
I'm sure the MCAT writers are well aware of the programs out there and what they say about the MCAT, and they design the test to avoid giving advantages to anyone who subscribes to any training group.
That being said, the mastery of the information, which is only added by EK can only help you. Just don't pay too much attention to the gimmicks and the heads ups. Listen to the substance, and absorb the meat of the information. For that, I will highly recomend their material and their tapes.
I read voraciously everything I could find, and got a 32. Use EK to get a grip on the information. Don't think it will give you everything you need to know, though.
Good luck!