I really enjoyed this book. I became a test manager three months prior to reading it. I wanted to see how a large company ran testing. I was really impressed by the responsibility that Google places on its software engineers for quality. Testing and quality belong to the entire team and not just a few people with the word Quality in their job title.
The end of the book was a surprise. It made me envision a future where quality was just built into the framework for developing applications and not something bolted on at the end. The tools are getting better and the practices are improving to the level that testers can focus on the user experience and not basic correctness.
The hope for testers is that they will be more of a user advocate than a button masher.