The studio examples are regionally limited to the author's home base area (Southeastern U.S.). The good part of this restricted view is that the photographs are numerous and pretty fantastic. The drawback is there's a lot of us who have to factor in different weather and terrain conditions--depending on where we live.
The plans shown didn't have any measurements showing scale, so it was hard to get a true feeling as to how the various pieces of equipment filled the space. The graph paper used as a backdrop for these plans only caused more confusion, as there was nothing to show if each graph square equaled one square foot, or four.
I would suggest--to anyone designing a studio--that you beg, borrow or buy your own graph paper and do your drawing to scale. Also draw your equipment to scale and cut out silhouettes so you can try out many approaches to placement.
None of the studio plans matched my desires or needs, but the examples are varied enough that bits and pieces of almost all were helpful in designing my new studio. Pay particular attention to the information on traffic and work flow. It will help whether you work alone or have students sharing the space.
All in all, a presentation with classy paper, pictures, and prose--and all at a great price.