I loved this book, I thought the idea was brilliant. I'm a huge fan of dystopian novels and this is one of the best. The characters, settings, futuristic machines and ideas where all really easy to imagine, so I felt like I was really there. 
 Tally is an excellent main character, although she's been brainwashed along with everyone else she's still fighting for what she truly knows is right and has a great sense of adventure. She reminded me of Katniss Everdeen from the Hunger Games trilogy. 
 The machines of futuristic aspects where equally awesome with flying hoverboards as the main futuristic aspect. They were used LOADS. There were also stuff like Talking bridges, rooms etc. A few giant robots too. 
 The story also tells you what happened to the Rusties, who are essentially us before something almost completely wiped us out and we evolved. Tally talk about the Rusties as if they are a completely different species, not her ancestors, which I find amusing. 
 Finishing with a 'must read the next book' cliff hanger ending, this book is a must read for Young Adults and adults alike.