There's not much I can fault about this book. It's written in a friendly and easy-to-access sorta way, that didn't leave me (a beginner) feeling intimidated or overly patronized. The content is logically organized into various chapters, each of which are full of excellent examples detailing common errors, and what can be done to improve (as well as showing you examples of finished versions). There are also a lot of practical tips to help you identify areas in your writing that need improving.
I haven't finished my story yet, but I am very much pleased that I gave this book a try, as even though it is aimed at editing your work, it is still an excellent and very useful read for work-in-progress. Many of the points raised I have noticed already in my own writing, and have already begun to apply stratergies described to help me improve.