I picked up this book as a whim because I had some book tokens going spare and at first I struggled with it. The problem I had was that there were no practical examples in the book, instead he would make a point, repeat the point and maybe give some contrived numbers to illustrate it. Its lucky that I didn't lend it from the library otherwise I would have sent it back straight away.
So why am I giving this 5 stars? Its because his approach (albeit inadvertently) was genius. Often with self help books the author will offer examples, which you will imagine and relate to and then you will carry on reading, much as you would with any good book. As Richard Koch left so much to the imagination however, I couldn't help but think of my own circumstances and how I could apply it to me. And as I had no example to lead me, my mind went and applied 80/20 to the whole of my life, the implications were mind blowing.
I am still working to get to my full 80/20 state because doing so is sometimes an uncomfortable process, however I have found that I am more successful, feel less guilt, commit more time to things I enjoy, am more organised and as one other review said, I walk around thinking that I have a secret that not many other people know.
I would warn that this is an eccentric concept to get your head around and if you apply it to every aspect of your life then your mates may label you as a bit mad or lazy or lucky or a genius, however it will turn your life on its head and may just be the best book you'll ever buy.