He repeats the same stuff for almost 200 pages. Only one or two ideas were new to me. He spends a lot of time name dropping and bragging about his career but never explains any science, so I'm not sure what his qualifications are except having sold mattresses. In the last chapter he says some weird things about sex. I read the book in two evenings so didn't lose a bunch of time, but I'm not sure I'd recommend it to others.