I picked this up at Elliot Bay books, where it was faced on the shelf, because the cover blurb was interesting and because they have an awesome SF section and I figured if someone had bothered facing this, it was worth a look.
The characterization in this book is excellent, and of particular interest is the characterization of the artificial intelligences, which, while they often present themselves in human manners, are distinctly non-human. The setting is detailed and fascinating, and the events of the book clearly tie in to a well-thought-out history that stretches back over a hundred years.
The pacing is... okay. Frankly, the book could have been faster-paced, and I would have enjoyed it more.
The language is smooth, and the author does a good job of switching between multiple viewpoints. However, I often found myself irritated at the choice to include particular words; it felt like the author was getting in my face, trying to convince me he'd thought things through and done his research. Yes, it's great to know how your technology works, but I'm skeptical that the characters would have been paying as much attention to the underpinnings as the word choices implied, and if it wasn't the character paying attention, then it was the author drawing my attention to it, which I found to be unhelpful and distracting. Perhaps less of that would have helped a bit with the pacing problems.
Despite the attention to technical detail, I'm not entirely convinced that the interactions of the AI and the network system are consistent throughout the book. It seems to be the case that AIs are physically present in their 'base units' and are too large to move around easily, and that it would also violate multiple important laws to do so; but at other times it seems like the AIs are in fact in different locations entirely, disconnected from their base units. The most obvious instance of this to me was at one point when an AI is conducting an assault on a heavily fortified building and not even noticing the two-tenths of a second delay each way there would be between his base unit and the battle mech he's driving. It's quite possible that there's something I'm missing here and that it Really Does All Make Sense - but if so, I find the fact that there's something I'm missing to be itself indicative of a potential flaw.
I was also a little irritated about the gender balance of the book. This is the 22nd century. There's one important female character, who's in a supporting role, and she's got a female AI, and there's one female AI that shows up early in the book who is supposed to be a big name in the entertainment world, and there's one female AI who acts as a secretary and shows up for a few paragraphs. Everyone else is male, which means that the cast of the book is *overwhelmingly* male and that males - human or AI, and by the way why are AI presenting in gendered forms anyway? - are doing almost all the important stuff. The one female secondary character is important insofar as she discovers a key piece of what's going on and allows the reader to see a considerable amount of a part of the world that would otherwise not be visible til far too late in the book. But that just isn't all that much.
The book ends, in essence, on a cliffhanger. The pacing really picked up in the last quarter or so, which makes me somewhat curious about reading the next book, but in general I prefer books that are at least somewhat self-contained. This one has no satisfying conclusion. I probably won't pick up the next book unless I hear really good reviews of it from a lot of people or from trusted sources.