This book is actually the best one of the two robot city series (Robot City and Robots and Aliens). Unfortunately I had to wade through 12 not very good books to find it, and its still not stellar. I'd recommend giving both these series a miss unless you're obsessed with completeness in Asimov's Robot universe.
Given how disappointed I have been in other books in this series, I was pleasantly surprised by this one. The style is very readable, and the content is interesting. The plot seems more nuanced than some of the others in the series, and the characters aren't as one dimensional either. This isn't the best book I have ever read, but it was surprisingly solid, especially given some of the poor ground work it had to deal with.