I'm about a third the way through and am very impressed with how he covers each topic very succinctly and clearly. I've written a few android games before reading this book, and now I can see that I've been hacking a lot of code together. He provides a nice, structured framework to base your code around that makes sense. A few times I've read something and suddenly realized why my code didn't work very well and why the way he writes is makes so much more sense.
I'm excited to write my first game after finishing the book!