My review as a Librarything early reviewer:
The first thing to talk about with this book is the form. Normally it doesn't make much difference, but this is a cellphone novel turned into a book turned into an ebook (I read it in PDF). So small chapters are turned into nicely laid out pages which are then put onto a screen. I think it would be nice to own the paper book. As the chapters are so short I think it's a good coffee table book which you can leave lying around and pick up to read bits and pieces from.
I read it in several bigger chunks and I found the pace of reading quite intense. There are a lot of line breaks, rather than longer paragraphs, which I took a while to adjust to.
The story itself takes a couple of unexpected turns and then follows a fairly predictable path, though you do need to keep reading to see if what you think might happen actually does. I couldn't really relate to some of the things the main character did, though perhaps it's because I'm a bit older than he is.