I've been thinking of picking up Gavin Harrison's Rhythmic Visions Book/DVD and was wondering if anyone has worked on it?

I've done some of his displacement exercises and such and find them fascinating.  One thing I'm wondering is if I will end up with a book that will teach me awesome exercises that will be difficult to incorporate into band rehearsal without getting stuff thrown at me!  

Secondly, I realize that not everything he has will be able to be used in all situations.  I was just wondering in general, has anyone been able to grasp the concepts, and if so has it helped your playing?

Floyd:
Yes he is. And if you have the chance to see him playing live - go there under all circumstances. I've seen him doing a workshop in Munic - simply unbelieveable.
Evertime when I am in a music-shop I grab his book and  think about
buying it. But I'm not shure if there is a chance to figure out this stuff