What started out as a much anticipated book, was soon destroyed by the extremely bad editing. I don't mind a few syntax errors, but on every page!? Furthermore, I dislike when a topic suddenly starts refering to another topic and it is explained 150 pages later!

I could go on, but the quality of O'Reilly books have never been lower than this.

It could have been an outstanding book, but all the mistakes, combined with the sometimes shallow coverage, makes it only Ok.