Panopticon is a must-have Eclipse Phase supplement.
I feel that Posthuman Studios could have given it another once-over check for errors, though the errors present are simple typos rather than major errors. That said, if you won't be totally nit-picking with the typos and you'll actually read the whole book, you'll be pleasantly surprised.
The art and writing, as always, is top notch (sans typos). The book offers in-depth analysis of social issues through a science-fiction proxy, though that's to be expected from Posthuman Studios, they really hit home with Panopticon. Add in a ton of new rules for all sorts of awesome (surveillance and uplifts, as well as habitat stuff), and everyone will be happy.
The nice little intro story kicks off the rest of the book nicely by providing a quick glimpse at some of the deeper discussion of concepts later on, and also is plain awesome (to use an academic term). Then in true Eclipse Phase manner, the book launches in to well over a hundred pages of setting and background, combined with little fiction or explanatory blurbs. While I like setting more than the average guy, I feel that even fans of mechanics that normally disdain setting exposition would enjoy the more cerebral standard set by Posthuman Studios.
The book wraps up with mechanics for everything discussed throughout the book, including lots of new morphs and gear/services. As always, the mechanics are solid, and Panopticon delivers on providing a solid science-fiction experience without feeling cheesy.
I'd recommend Panopticon for any fan of Eclipse Phase. The high standard of quality set by Posthuman Studios really shows in this product, even if there are some lapses in grammar and spelling that are aggravating.