I enjoyed this book overall, I have critiques but they do not take away from nor negate my opinion that this is a good book. I'll read the next one!
My critiques:
I really enjoyed the concepts that were presented, they're captivating enough that I'll come back and read book 2 'The Surface'. The relationship between the MCs is probably going to be a tragedy though :D, she lives so much longer than him. He's gonna be a blip in her long life.