First of all, I see how this book can help some people. It's certainly not useless.
However, this book, like Story Setting by the same publisher, has many typos, feels a bit laundrylisty, and tries to fill in more pages when things could be described in a more concise way (eg. the Low/Below Baseline/Baseline/Above Baseline/High descriptions is used way too much and takes way too much space, and in most cases it doesn't feel useful to me).
My personal highlight is the Types and Roles chapter. It's very good and it's a good reference and inspiration source to write characters. The chapters Aptitudes, Experiences, and Resources feel like fillers and I think they could have been a couple of pages each, instead of ~10 pages each.
[2 of 5 Stars!]