I enjoyed the book. But then, I read it as a book, starting with page 1 and reading through to the end.
As a result I knew from the half-page sidebar what each chapter was about and what to expect. The fiction was fantastic, and worth the pdf price on its own. The canon background is, for me, what has provided the foundation for the game to be one continuing reactive game world so reading Jackpoint comments about everything going on makes it feel... well, real.
The "crunch" parts were, on the whole, great additions and call-backs to earlier editions. I was particularly glad to see the return of the Digigrade Legs and Raptor Feet. Kid Stealth Lives!
Is the book perfect? No, of course not. The minor editing issues I can live with and ignore. There are some major points that have been addressed perfectly well by others, so there is no need for me to jump on to the bandwagon there, and I still have a real problem understanding the Addiction Rules (and I have a Law Degree!) so would really appreciate some major clarification there. It feels sometimes as if the author and the editor have had background conversations that explain the intention behind certain parts that never made it into print.
Perhaps the organisation of the books could echo that of earlier editions a little more? Have all the "fluff" at the front of the book, allowing for the campaign world to move forwards and give the canon characters a chance to chime in on what is going on in the world, and then have the "crunch" start and run uninterrupted for the remainder of the book (allowing for some fiction at the start of each section if appropriate).
If I could have a wish list It would be for the outstanding Errata to be addressed officially, and to have a more regular FAQ, even if were only once every 6 months. Oh, and for technomancers (except for Netcat) to be rounded up, implanted with all of the Monads, and have the whole kit and caboodle fired off into the sun. And a pair of Kid Stealth legs to replace the useless ones I've currently got. And a pony.