I just got this book today and find it a nice read. While very similar material exist on the website or on similar zen/productivity sites I purchased it to read while on vacation.
There are a lot of good ideas/concepts for simplifying things. I for one was tired of doing too much and not doing enough of it well. I started to reduce things in my life before reading this book but it validated some of my thoughts and put them in the context of a different way to live.