This book represents a useful tool to many GMs (especially those that don't deviate that far from the norm of 15 point buy and standard wealth by level), with (almost) fully developed stats for characters from every core class and of every level. I say almost fully developed because there are large (and glaring) omissions that escaped my initial examination of the book.
The worst of these is the omission of spellbooks from every wizard in the book - both NPC and PC, but other issues exist throughout the book and include NPCs missing components for prepared or known spells and bonuses that are slightly off.
While I'm sympathetic to the tediousness of running out spellbooks for ~30 wizards, not having spellbooks for stats that are supposed to be dropped in the game to make a GM's life easier is pretty annoying. What happens if one of these guys is dropped into the game as an enemy and the party tries to loot him? Do I now have to draft up a spellbook for him on the fly? Come on now. It also undercuts the idea that I could use the PC wealth stats as pregens for people on the fly.
The book also loses its application for people the further they move from the assumed norm (e.g. higher point buy or wealth) as the NPCs rapidly fall behind. Use of books beyond core also undermines the ability of these NPCs to provide real threats even to PCs many levels lower than them. This problem is amplified in many martial characters that are poorly built by any measure (not simply optimized).
That we get pre-genned PC versions of characters that only cover 3 levels as a whole (1st, 8th, 12th) is also slightly annoying, as it sharply limits the advertised 'pregen' usefulness of this. Adding even a single higher level version of each (say, 16th or 18th) might have helped a great deal in that extent.
Advertising 'tons of flavorful names and backgrounds' also seems misleading - many 'characters' have a single generic sentence or less. As a few examples "The master universalist draws power and knowledge from all schools of magic", "These wizards are steeped in the evil of their profession", and "These wizards protect underground communities". Flavorful backgrounds indeed (especially for 20th, 16th, and 18th level characters).
Finally, the lack of anything but core - though advertised - is somewhat disappointing. Not even iconic stats for other classes? I understand that including everything would have turned this into a monster book, but some of the decision on what stayed and what went is vexing to me.
