Extremely short version of a book review, kinda.
In short, I was quite impressed with it.
Dawkins, though given to occasional infelicities, is a very engaging writer. Good coverage of a lot of the evidence for evolution. Highly recommended.
It's also a book that sits well beside Coyne's Why Evolution Is True - there's definitely value in having both.
I'd write more, but I am not feeling up to much analysis of the book right now.
[To be more specific, I now have a partially collapsed left lung, as well as some scarring on the right lung, which is apprently otherwise okay now. I feel a bit crap, to be honest.]