Well, I finished it - some interesting events, but overall I found it a bit lacking in depth.
The Dreyfuss detective element was engaging - but considering that Panoply existed solely to maintain and police democratic privileges (established in chapter 1), none of the characters seemed to have any ideology relating to this, which I found odd. This was especially underlined when Panoply does invoke a democratic vote, only to ignore the result.
There may have been something potentially profound in how Dreyfuss enjoyed the feel of a gun so much that he was prepared to ignore the very principle of democracy that he had dedicated his life to preserving - but I couldn't help but feel that Reynolds simply didn't give much consideration to the necessary socio-political implications of his own world.
Thalia Ng's sub-plot was just daft fantasy. Conveniently, she doesn't check her work - then she spends chapter after chapter being chased by robots, barely added anything to the story.
Convenience continues to run through the plotting - an entity spends decades in a desperate battle to remain alive, only to freely allow itself to be killed, despite having the potential to take over Panoply itself. The leaders of Panoply are completely devoid of ideas or intelligence, in order to make Dreyfuss look clever. And Gaffney - could have been an interesting moral-grey character, but instead just kicks cats - and then, despite being potentially the most dangerous person in Panoply, is given no real security detail. Then the same people who agonised to reach the decision that some must be sacrificed in order to save the Glitterband, suddenly reverse this mindset to protect Aumonier.
It was entertaining in parts, dragged out in others, and there was some nice imagery. But I never got the feeling that Reynolds had really given anything in this story any deep thought. Characters lacked motivation and belief, and the world itself seemed fundamentally anachronistic and lacking in substance.
An interesting read, but after some of the SF novels I've read recently, The Prefect seemed remarkable unambitious by comparison. Perhaps I should have started with something from his Revelation Space series instead?