My Reaction in a Nutshell: 
 Not Meyer's best work. 
 The Long Version: 
 I was really excited to start reading Fairest. I love what I've read of The Lunar Chronicles so far and I was really looking forward to reading Queen Levana's origin story. Fairest spans over ten years in a book that is barely over 200 pages. This left a lot of gaps in the plot. 
 Fairest is my least favorite story in The Lunar Chronicles. Although it does a nice job of showing how completely crazy Levana and her sister are, the overall storyline and writing are weak. But it is interesting to read about how the other characters we know of in the series are mentioned subtly throughout the book. 
 This novella isn't necessary to The Lunar Chronicles, so if you can't obtain or afford Fairest you won't miss out on much. 
 ***TRIGGER WARNINGS: burning alive, abuse, mind control (general and sexual), R