I really liked it. Good artwork, tonnes of humour (seriously, the car-parking bit cracked me up), and a really nice tribute to the Caped Crusader.
I don't regularly read DC, and don't have incredibly strong feelings about Batman, so there's nothing here to upset or disappoint me, like some reviewers who've gone before. On the other hand, by the same logic, I'm surprised to have found myself emotional over a few parts of the book. Well worth reading for the "main event", and the bonus features included in the deluxe edition were gravy. I really enjoyed the sketchbook.