I also posted this on my blog With Her Head in a Book. 
 While I didn't read the book in one sitting (like I do with most of my favorites), it still easily hit the marker for me. Overall, I found the world Cal and Frida live in to be the most interesting aspect of the book simply because it's entirely and eerily possible. At first I was describing the book as post-apocalyptic, but I don't think that's truly accurate. Post-apocalyptic makes me think of a sudden, dramatic change while Frida describes their life in L.A. as slowly declining into a poverty stricken mess. 
 Cal and Frida's relationship, while not flawless, is so absolutely perfect. I'm a bit of a sap and can't help but be a sucker for romance done well. Their passion and trust for each other is beautiful almost, even with all of the secrets they keep from each other. Both of them are quite stubborn and had very strong opinions. I found myself agreeing with Cal (and being angry at Frida for not seeing it his way) during his chapters and vice versa during Frida's. In the end, they were there for each other and they knew that without saying anything. The entire time I was rooting for them, their family, and the pregnancy. 
 The ending, while it didn't answer all of my questions, sparked an idea for me about the first generation of people living within Communities. For those of you that haven't read California, I'll try to keep this spoiler free. The government and the excessive surveillance reminded of other post-apocalyptic books (you know the kind - where life is very controlled, has been for as long as anyone in the book can remember, and anything out of the ordinary is "fixed"). The parents that originally started out in these weird societies must realize what type of world their kids are going to be raised in. So what goes through their minds that says a horribly government controlled life is the best one out there? One of Frida's inner-thoughts is "On the smooth days, it was as if they'd always lived this life. If at other times, things felt a little off, so be it [...] she could ignore it." Such a strong theme in this book is family (and being safe), so I can see how even the Communities is more bearable than the wilderness. 
 Everything I expected to happen, did happen, but not exactly how I imagined. So while many key points were predictable, they didn't take away from the experience. Maybe because they were all things I was hoping for. 
 Overall, I would recommend this book.