4.5 stars. 
 She held the foot over the water and let go. 
 Wonderful ending to a wonderful story! I wished some minor stuff would've been explained more (Like how did Cinder know about the hidden documents Garan put in Iko's personality chip? we only get a subtle hint about it, and next we read that Cinder is sure of it being hidden there... why didn't we read about her actually checking and confirming it? Iko seems surprises when Cinder tells about it, so she definetly didn't check it. I found that sort of small stuff a bit annoying). 
 BUT overall this book was wonderful. I loved the ending, the action, the friendships, everything!