I read this awhile ago but was thinking about it just now when I saw that a sequel is coming out. I have a number of issues with this book, but I will mention one specific instance where it differs from other more successful books about fantasy-ish medieval-ish kickass teen girl assassins (Grave Mercy, Dark Triumph, and Graceling). 
 There is one scene where Celaena wakes up and finds someone has left her some candy next to her in bed. Would Ismae, Sybella or Katsa have slept through someone getting close enough to them in their beds to kill them? How is it that Celaena, the best assassin EVER, wouldn't notice that or have functioning precautions to warn her something like that may happen? And not only that, she immediately begins to eat the candy without checking it for poison. They say over and over again that she is the greatest assassin EVER EVER EVER OMG EVER but like... seriously?