Warning: The information in the book will spoil the plots of the Dresden books through Skin Game. If you don't like spoilers, tread lightly.
The PDF weighs in at 64 MB but doesn't feel like it. I tried it in Adobe Reader, EZ PDF Reader, and Moon+ PDF. It was smooth and quick in all three.
It's fully hyperlinked not only within the TOC and the index, but also within the text. If you see a reference to another page it's hyperlinked.
All chapter and subheadings appear in the PDF bookmarks table.
The text is in a single column format with margin-notes - which makes it idea for reading on a handheld device such as a phone or tablet. Text is black, Subheadings are purple. Chapter titles are in white on a purple background. Page margin contain the chapter title of the page, so you don't get lost.
The game is presented as a RPG game written by Ivy (the oracle) with notes from Kinkade (her hit man). It's cute.
The art is dresden-appropriate and not excessive.
This is one of the best PDFs I've come across. Initially, I blanched at the idea of paying more than $10 for a PDF. Most of them aren't worth it (epescially the trainwreck that is the Coriollis PDF). ...but I pulled the trigger based on interest in the game and the source material. It is well worth it.
(If you've seen the version of this that leaked to backers a few months ago, this is a much improved version of that document. Buy it, you will not be disappointed.)
[5 of 5 Stars!]