Larry Niven has written a lot of great science fiction books over the years, and I would highly recommend you read those rather than this book.
There isn't much of a plot in that the protagonists just bounce from success to success. The whole thing is dripping with political snipes at people who disagree with the author on various issues. And it's full of dialogue with lots of "in" jokes for people who follow a lot of sci-fi. One of these alone might have been tolerable, especially if mixed with a great story, but that's not really there.
The science fiction premise was kind of interesting, but were the sentient nanobots given their choice in the matter, I'm sure they too would have fled from this book towards something better.