The premise of the story was the first thing that caught my attention, because it seemed like a great moment of black humor on the author's part... having parented several teenagers, it's no mystery to me how a parent could contemplate Unwinding their precious little 13-17 year old :) 
 The most interesting thing about this book, for me, was Shusterman's ability to introduce really hot-button issues with such ease and ambiguity... we are never really specifically told how to think about the controversial issues (abortion, adoption, organ donation or sale, religion, the military, medical practices, etc)... it is left to the reader to ponder and answer for themselves. It will be interesting to see if the sequels begin to answer these questions, and if so, how. 
 The writing style is a little too simplistic for my taste, but the characters and the storyline felt believable and relatable. I found the chapter on the unwinding very disturbing -- it was horrifying without being graphic or gory, particularly because the author managed to convey how surgery of any kind could be experienced as a violation. 
 An excellent YA book that I would recommend to teens and their parents. I also think it would make a great movie.