Usually, I'm not a fan of these types of books, where a publisher has persuaded an author to throw together a bunch of previously published articles, talks, and the like, into a collection for sake of putting it on a shelf.
That said, I found this book pretty good for a couple reasons: (1) It was interesting to learn some background on Gibson's writing process and his, well, I'll call it 'observational research'. (2) There were some interesting bits of background on books of his that I read that gave me new appreciation for them (e.g. I feel much better about Pattern Recognition now), and (3) it was interesting to read these different pieces from over a decade or two, that were each mini-time capsules of futurism, upon which Gibson gives some additional commentary.
If you like speculative fiction and near-term futurism, this is a good read.
Distrust That Particular Flavor