After the glowing reviews on this thread, I thought I'd take a look.
Yes, it's obvious a pile of work went into it. The linking is an order of magnitude beyond any d20 .pdf I've heard of...
...but I still won't be buying it.
The big reason: Readability issues.
The body text is in a sans-serif font which I find hard to read onscreen. By the time I get the text big enough that it's readable, the column is so wide that my eyes have to traverse several inches. That leads to eyestrain pretty quickly. With justification turned on, the intra-word kerning is not wonderful, either. (It almost appears that there was a TrueType vs. PostScript font clash.)
There are some sections (spell lists) that are not only in a sans-serif font, but in all-caps as well. Mixed case is significantly easier to read than all-caps. Bolding that font makes it even worse: the words become so visually heavy that I find myself wanting to squint at the page. Further, every other line is on what looks like 30% grey -- too much saturation for a background for small, dense type.
Aside from the readability issues... this is quite nice. One other thing I would find useful: bookmarks grouping of feats by type, in addition to the alphabetical group. In other words, where the bookmarks under Feats are currently
-Prerequisites
-Types of Feats
-Fighter Bonus Feats
-Item Creation Feats
-Metamagic Feats
-Feat Descriptions
+Feat Name [Type of Feat]
[alphabetical list follows]
what would be even more useful is
-Prerequisites
-Types of Feats
+Fighter Bonus Feats
[alphabetical list follows]
+Item Creation Feats
[alphabetical list follows]
+Metamagic Feats
[alphabetical list follows]
-Feat Descriptions
+General Feats
[alphabetical list follows]
+Complete Feat Listing by Name [Type of Feat]
[alphabetical list follows]
I'm not suggesting that the feat texts should be included multiple times, just that each type of feat in the list above should have additional bookmarks that redirect to the appropriate item in the text. That makes it easier for the person who needs to consider *only* one type of feat (for character creation, for example).
Out of curiosity... would you guys mind sharing the product name(s) of the software you used on this project, aside from Acrobat? (This tech writer's a FrameMaker nut, so I'm always curious to know what other software people use to create their PDFs, *especially* when they're well-linked.)