I feel lucky that i read the book in this time because "winter" is coming in days and i can't wait, i mean i don't have to wait. So.... My main thoughts about the book are: 
 You probably noticed that there are so many people saying that "Cress" is the best book in the series so far, you know why??? because IT IS. 
 You can notice how Cinder changed through the journey as she became more confident, more strong and she knows what she's doing (almost), There is a little bit of everything, there's action, romance, tragedy, suspense and humor, i mean everything you can wish for, many secrets are revealed too, and guess who's starting a rebellion :)