The fact that I have read over 1,000 pages of this series in a matter of days tells you all you need to know about the book. The plot and the writing and the characters are addictive. 
 However, I completely empathise with the anger felt by readers over (view spoiler)[the Chaol situation. Chaol was buried in Heir of Fire but the nails were hammered into his coffin in Queen of Shadows. The time I spent reading the Throne of Glass and particularly Crown of Midnight are made pretty worthless by the fourth book. It's quite a bitter pill to swallow. 
 Aelian -it's Aelin now dontchaknow- seems like a very different character than the first two books. In fact, straight from the horse's mouth: 
 "It's Aelin now," she snapped as loudly as she dared. "Calaena Sardothien doesn't exist anymore." 
 Well, sorry, but I rather liked Calaena and it's who I've been following around for four novels and five novellas. (hide spoiler)]