Jeff writes well, but everything covered in this book is all basic stuff that most writers would do anyway. He does cover each point well, so it deserves a couple of stars, but he provides no groundbreaking information.
I bought this booklet to increase my knowledge of using the KDP system. I have in the past used this system to help promote my own book EVENTIDE (Lost in Darkness) and the tips Jeff uses are worth the price. As writers it helps to use what is on offer. I think if you have an idea of what you are doing, using the KDP system, (and the tips in this booklet) is well worth it to increase your own presence within your chosen market.