Overall, I found I disliked and could not identify with the majority of the characters. I could not relate to their emotional states, nor did I find the picture painted of civilization(s) at all coherent.
Two things rescued the novel for me: the inspiring descriptions of the Phillip Wing's two master works -- the Tomb of the Goddess and the Glass Cloud, and one passage.
This is the distilled and brilliant passage from p238:
"Immortality was simple... Essence consisted of viewpoint and structural memory. Viewpoint was each individual's unique style of processing experience; structural memories were those that composed viewpoint. All other memories were trivial, extraneous to existence.... Only structural memory, overwhelmingly the result of genetics and environment, was essential."
Never before I had I thought of self redux in such a fashion, though I found the author's embrace of behavioralism over free will annoying. It made the characters less real.