I got it and I have to say for the most part it's awesome! There is a chapter on sweep picking which is no big deal to me, but the chapters before that are incredible. Now I have understanding of playing cleanly.
I have been playing for a long time, and this is information that I have never been exposed to. You have to get it.
Here is the website. http://www.screamingfingers.com/betatest.html
