Way to read back-dated posts, me!
Ok, I actually find this TA a goldmine. In addition to providine ready-made NPCs on the fly when my PCs do unexpected things (And really, folks, how often do they do anything else?), I use it as a guide when building adventure-specific and custum NPCs; usually I need to change only two or three small details (Add or subtract a weapon, redistribute some skill points, etc) to make them perfect and convince my players that I stayed up all night making up the NPCs for their latest exploit.
WARNING: There is an errata note I've found here.
In many (Not all) of the NPCs in the book, at higher levels the DEX score goes up. This is calculated into defense, initiative, etc. but frequently forgotten when calculating attack values. That's the only mistake I've found consistently. Specifically, I believe the Elite Barbarian and the Regular&Veteran Infantry NPCs have this problem.