The vast majority of the book is relatively easy to read while also not using overly simplistic language. Near the end there are some parts with lots of formulas and algorithms which at first glance made me wince, but the explanations were quite clear as to their purpose and meaning; anyone with above average math knowledge will figure out the patterns immediately.
The entire book is a collection of essays with lots of sources to back the claims (over 800 for about 300 pages). The essays themselves work off one another in a very natural way, but rereading the book after about two month hiatus would be beneficial to really solidify the ideas. As the essays progress, they start from what could be called point zero (which for would be where the average person is in their knowledge) and works its way through the fundamental flaws of our current system, then it introduces the ideas for the new system, and it finally all ends with ways to approach the transition and how to advocate for it. This last section could have more done for it by listing organizations also advocating for a NL/RBE; for instance, open source ecology is aiming for a post-scarcity or RBE system so working with them could be highly beneficial for everyone.
As for the problems with the book, I only found one and it was quite minor. There's a part that talks about switching to a vegetarian diet because raising cattle for meat increases CO2 levels dramatically. This is true. However, there's a good TEDx talk given by Allan Savory about how we could use cattle to counteract desertification and climate change. So it's just some new information we need to apply to the book, as is the way of science; I hope others will come forward with their information so we can refine the book even more.
Overall, this book gave me a lot of information, refined some ideas rattling in my head, and actually sparked off a couple of ideas: one for a thesis and another for a book. Truly revolutionary book that once read becomes a self-realizing truth. However, the trouble is convincing a person to read it when they are already convinced against it.