What makes "Supersystem soo good?"

[AdvancedPlaya]

Almost everytime I try to watch Poker on TV, i hear about Doyle's "legendary" "Supersystem". I don't get it. I read the book, but i don't really get what "GREAT" secrets he gave away that had never been released before. With only about 200/600 pages about Hold'em, what most of us concentrate on, it seems like any other Hold'em book I have read, if not a little more limited on info. So why all the Hype? I do not understand. Please, i need a reasonalbe explanation!!!