Paul handled the many possible configurations very well, whether you wanted to run your code in a container, on macOS, or on Linux, Paul covers it all. He also helps you through any build errors you are likely to see and I was able to resolve all odd issues I encountered thanks to his coverage of them.
The book is padded a bit with Swift syntax and he is a bit repetitive in repeating his code throughout the book a lot so there is not as much bang for your buck.
The beginning does a very good job of slowly easing you into Kitura and its various frameworks. Paul also takes a brief excursion to talk about SQL, databases, password security, salts, Ajax, and regex which I greatly appreciated. I would have loved additional resources to refer to on those subjects afterwards as well. The wide variety of topics touched on in the book was a pleasant surprise to me.
As far as the projects are concerned I am a bit disappointed that he did not take the CMS project much further. I did feel however that towards the end I was not learning as much (thanks to all the knowledge I'd garnered throughout the book) so perhaps that was for the best.
Another critique is that a lot of the homework assignments felt shoehorned in without a lot of thought to make me motivated to do them.
Towards the end Paul goes over best practices but I was alarmed by the amount of force unwrapping (!) he was still doing.
Regardless the book is good and is what you would expect from this author. You'll move through topics very quickly and it's ultimately up to you to reinforce your learning through other sources.