Perfectly enjoyable but without much substance. The worldbuilding was a little weak at times, but it had its moments. As well as some interesting identity reveals--that you can probably see coming from a mile away, but weren't any less enjoyable because of it. 
 If you're looking from some light YA dystopian and have an afternoon to kill, I'd go for it. It was ridiculous at times, but still fun. I'm not sure I care enough to carry on with the series, though.