This is a very cute AND quite "modern" shifters story. 
 The shifting phenomenon here is great! There are some clever/interesting new concepts like breaking or the myth about scents and smells. 
 The lifestyle is also kind of modern and does not revolve around pack meetings and hunting during the full moon. The shifters can be seen living a normal life, using social networking websites to connect, chat, discuss teenage shifters issues; they don't have exactly the same problems as human teenagers/young adults. They are so... modern, more human, less "bestial", and yet they are terribly bestial, animal at the same time. 
 Fav part in the book: 
 (view spoiler)[ 
 Imagine eating with someone and then he asks you: "can I have the bones?" And you know it is not for his pet dog, but for the dog in him... It was just so strange and amazing. (hide spoiler)] 
 Must-read in the shifters genre.