I thought the relationship between Allie and Aidan was really unique. I like how they are equals in power and that they are so powerful not everyone is comfortable around them, which makes them drawn to each other. You really want them to be together, but it's early in the series and Allie has so much going on with all the changes she's been through, it makes sense that she wants something normal at this point in her story.
I also really liked the way their powers work. It was very believable and not over the top. Their gifts are subtle and well thought out so that they aren't like every other super power out there. Like the way Quinn can become "invisible" but not really, he can just make you think you don't see him but it's not like he vanishes. It's about as realistic as superpowers get which was a nice change.
It does start a little slow. The first chapter really grabbed me with a lot of activity and it raised a bunch of questions about why they were moving so suddenly and then chapter two was interesting with the way she met Aidan and you knew there was something going on that Allie wasn't quite getting. And then it goes into a lot of normal for a few chapters. It's the first really normal life Allie has ever known and in hindsight, I get what the author was trying to do there. But once you hit chapter six it really starts to take off and by chapter ten, you cannot put it down! Such a great cast of characters and an incredible ending! Highly recommended!