This book was kind of like a push me pull you. I would read some and I would start to like it, and then read some and then start to unlike and back and forth. I guess for me, it felt like there was lack of detail. I would have liked to have a bit more depth of how the androids were made, and a little bit more detail of the problems between earth and mars and what lead to the colonization on mars. (Just more detail). I did find the characters immature for their age, running away and 'getting married'. Maybe the story was just to cheesy for me at some parts too. I did like the ending though, when the sisters transplant was successful, could lead to interesting controversy for a second book?
This book didn't quite work me, but it doesn't mean it was a bad book.