This is not a review of the source material, but of the quality of the pdf.
The resolution of all the pages is very good. The images look brilliant (like you had the hardcover in hands) and all texts are readable. Not only that, the document is completely searchable, which is a must have for PDFs as I see it.
On the downside there are only thumbnails for the first two chapters in my download. I guess this will change in later releases, but for now that takes away the 5th star of my rating. Another star is subtracted for the lack of links in the document. I don't expect a fully linked document, but links from the Table of Contents to the different chapters of the book would be enough to make this book a lot more useable and thus earn another star.
Overall I'm satisfied with my purchase. To earn a full 5 star rating, some "modern" pdf features are still missing.