I too, am interested in this.

From what I gather reading the synopsis and the relevant discussion here: I'm not so sure how useful it would be for me. At the very least: I think it'd be a challenging technique for me to pick up.

It sounds like it relies on having a good spatial memory, e.g: being able to hold "maps" in your head. I've always been terrible at that, just ask anyone from my D&D campaigns.

However I think I'll pick up a copy of the book; even if I can't apply the techniques it really piqued my interest.