Steven Yellin's the Fluid Motion Factor (book), Buy or not buy?

I listened to a recent podcast episode of Golf Improvement Podcast by Tony Wright.  There, Tony briefly mentioned Steven Yellin and his methodology, Fluid Motion.

Suddenly, I had some interest in it.

Before I pulled a trigger, I did my homework.

Here's a review of Mr. Yellin's book that I found:

http://themindofgolf.com/fluid-motion-factor-steven-yellin/

After reading the above review, I decided not to buy the book.