I find Mills' frequent "bashing" of other gurus (mostly Tom House but also Paul *****, I believe) a real turn-off. I think his ideas on specificity training apply more to athletes at the highest levels and not as much to the young kids I coach. I think he has some interesting ideas about energy transfer up the kinetic chain. I'm told his book (albeit expensive) is a good read.
EDIT: Wow. How come Paul N-y-m-a-n's last name got blanked out above? Is that a banned word on this site?