(I downloaded this from amazon as it's currently free right now, and I thought the premise sounded interesting.)
Have you ever tried you rate/review a book that you both liked and didn't like at the same time? I went with a three because overall I did mostly enjoy it, and I liked the world the author created. But at the same time, there were things about it that irked me, and I would get so frustrated.
I wouldn't mind reading the second in the series some time if the price were to drop below my limit for books I'm not too sure of.