Something about the start reminded me of Harry Potter!
I can't believe I have jumped over this story. I absolutely loved the twist in it. I loved the lightness in it too! And poor Sissy, you made her so technically skilled, that I was blinking at first... way to go girl! Then it turns out ha, she was a boy. I thought when he ordered the new 'real boy android' exteriors Cinder had gotten faulty ones since you didn't describe them more. I liked the androids too.
My favorite thing in this story was the gender confusion. You made the original fairy tale modern and dressed both the Prince Charming and Cinderella in totally different dresses. I giggled at the outfit Teddy had to wear in the Ball.
Anything that studies the borders of gender is so interesting, and you didn't do this with too much seriousness, it fit well this particular story.
Really enjoyable work. I wish you would write MORE of these light toned stories too since you obviously have skills to do them.