Well I've bought it twice now. The first time I bought it someone I know stole it from me. I wasn't able to get it back basically because of how good it was and the wealth and powerful of the information inside the book! So I bought it again to read a second time but also to give it as a gift.
The only reason I wouldn't give it excellent is because there is some information in the book that doesn't apply to me and I ended up skipping those chapters. But most of it is great