This story would have been fine, except that some of the details didn't make sense to me and it bugged me. Maybe kids wouldn't have a problem with it. For instance, (view spoiler)[ why would Ty give the love cookies even to girls he found really unattractive? And the backwards effects were inconsistent and sort of impossible. And I don't believe people wouldn't catch on to the magic going on. (hide spoiler)] 
 I liked the family dynamics, and found Rose to be sympathetic and realistic.