I am going to totally restrain myself from spoilers. I HATE ruining books for others. I will say that I don't care what anyone else my say, I LOVED THIS BOOK!!! 
 Did it hurt me? 
 Yes 
 Did it wrench my emotions and drown me in my feels? 
 Definitely 
 Did it rip my heart from my chest and laugh ruthlessly as I dying? 
 Affirmative 
 Do I regret it? 
 NOT IN THE LEAST 
 I will say that most of the time things tend to just go along too smoothly for the main characters in Sarah's books, but in EOS there were definite parts where they faced the difficulties, roadblocks, opposition, and HORRIBLE fates due to things out of their control due to the way the coming war they find themselves facing. 
 SEE MY FULL REVIEW ON MY BLOG