I feel rating a non-fiction book is very tricky. You can only realize the full potential of the book long after it has been kept down. Some books may be enjoyable which results in re-reads, while there are some books at the other end of the spectrum which are kept down by readers without completing it.
I feel this book falls somewhere in between. The book had a nice premise and a lot of potentials, but it kept wavering from the main topic. The book tended to repeat itself or take a new direction without completing the current topic. Some sentences made me cringe while others felt flippant and not thought out properly.
Overall, a quick one-time read.