"If there's one thing I've learned, it's this: We all want everything to be okay. We don't even wish so much for fantastic or marvellous or outstanding. We will happily settle for okay, because most of the time, okay is enough." 
 To be honest I read this book because of John Green. When I read "Will Grayson, Will Grayson" I liked his style of writing and decided to give him a try (I mean the guy is a friend of John Green and he even mentions him in his acknowledgments). 
 I wasn't disappointed. I think the concept is great and what really made me choose this book above other of his. There was some minor faults in the logic of it, but he plays it safe by not talking too much about the rules and all. I decided not to get too caught up in this but rather focus on the story he IS telling; the love story about A and Rhiannon. Which is sweet in itself though I would like some more answers here as well. (view spoiler)[ It is made clear to us that Rhiannon has a reason to stay with Justin, she continues to say A doesn't know enough about that connection to really have a valid opinion. I always though that would get explained in the end of the book and was disappointed when it wasn't. (hide spoiler)] (This isn't really a spoiler, but it may spoil the experience while reading it so I put it as a spoiler). 
 I feel Levithan has managed to show of how life is for a wide range of people without making it seem like a moral lesson. A is easy to like; he is a good person who doesn't want to ruin the lives of the bodies he possesses and he seems well reflected. However I feel he loses this towards the end of the novel and get very selfish. The ending kinda sucked as well, I felt it didn't live up to the boundaries set in the book (view spoiler)[ he goes from not knowing a thing about how the people feels after he has been there to knowing exactly how Alexander is going to feel and the memories he will have of this. Also I think it's so wrong of him to just assume that since Rhiannon liked A she is going to like Alexander. Not to speak of how poor Alexander just suddenly wakes up with a strange girl in his bed (who he may or may not have a recollection off). (hide spoiler)] 
 It started off a bit pretentious, it seemed like he wanted it to be a bit more poetical than it actually sounded. This however disappeared after a while. All in all I liked the book and I'm willing to give it 4 stars despited of some obvious lacks. It won't become one of the big classics but it's entertaining enough. 
 Also there are a couple of misspelled words in my edition and even a place he uses the wrong word entirely. It didn't ruin anything but I though it was kind of funny that me as a non-native speaker found mistakes they didn't find (homophones sucks, right ;) )