I liked this book overall, however going in you have to know that it is part of a series and you can't just read one book and expect the answer because you'll come out disappointed. At this point (having finished book 1) very few of my questions have been answered and new questions have cropped up. There are two more books and a prequel (which I understand was written after the trilogy) so perhaps there will be some answers there. 
 I did like several characters. Thomas for one, and Minho. I hope both survive the coming adventures. I was not overly fond of Teresa. There's something about her that rubs me the wrong way, so I'm not too sure what's going to happen with her, nor what I *hope* will happen with her, but it's clear there are more experiments in their future.