Don't fret!
There are as many different ways to be successful on the MCAT as there are different MCAT students.
The reality when it comes to prep books is simple: which books you choose matters MUCH LESS than how well you use them. There are variations in length, quality and price, to be sure. And SDN seems to harbor an unusually large number of people who get really, really attached to certain book selections. The simple fact of the matter is that if you go buy the "complete study kit" package put out by TBR, TPR, EK, KTP, etc, you'll be fine. All of the big companies make totally serviceable books.
My usual recommendation is here:
http://forums.studentdoctor.net/threads/breaking-down-the-mcat-100-days-to-mcat-success.1043255/