I've recently started working with MVC 3 about a month ago and not longer after started reading this book.
I really liked the style of the book in that it is meant to get you up and running in short time without dwelling on things you probably generally know. The chapters are written by different people so you can really take advantage of different expertise.
Though the most important thing is that the book was instantly useful and I was able to apply what I was learning immediately and since it had enough advanced tips I was aware of some MVC 3 capabilities others on my team were not aware of. The chapter on security was exceptional with lots of good information. The last chapter of the book covers advanced topics in extending MVC 3 Controllers, Views, etc
One thing I really appreciated is that all the code examples are available via Nuget and this is something I would like to see with any coding book involving net programming. Plus there is even a chapter on Nuget and how to create your own packages for distribution.
Very worthwhile.