Boring. Anticlimactic. Boring. 
 Character development - eh, I didn't like it... Po and Katsa decided they loved each other too quickly. The ending was boring and the climax was short-lived. I understand that some questions were left unanswered so that the author could answer them later - in Bitterblue - but to me it just felt sloppy and lazy. 
 AND THERE WAS TOO MUCH TRAVELLING. 
 Mind you, I did like the idea and general story line. It just could have been executed better :)