I particularly appreciated being able to sympathize with the main character's emotional distress, and the confusion of having her will usurped. It brought up very adult considerations, while avoiding actual adult 'situations' that could easily have been related. I have to give it kudos for making me consider whether humans really do love better, clearer, and deeper when they are free to do so.
My only real complaint would be the sense of incompleteness to the ending. This book didn't stand alone, and in a way I felt it forced me into reading the third book. But then, I rather resent cheap cliffhanger tricks. I would have read the third one, regardless!