I haven't been able to stop thinking about these characters, so I read through a second time and here are a few brief thoughts: 
 - the authors have a done a stand up job in creating their characters. Everyone is interesting, and complex beneath the hedonistic facade. And compelling too. 
 - the dystopian world in this series isn't unique, but it is arresting. The concept of Eden doesn't work too well for me. However the brutal, barbaric nature of this land, divided into sectors and ruled with iron fists by what are essentially feudal warlords makes for some vivid and interesting reading - and also turns criminals into heroes. Fab. 
 - Lex and Dallas are my favorite characters, I think. they are vibrant, intense, passionate, perhaps more so than the others, and I enjoyed their story even more 2nd go-around. I still contend though, that I wanted more for/from them. The authors spent a lot of time developing/expanding the world they'd created, and the opportunity cost of this world building was Lex and Dallas' story. There was/is so much more to explore with them, as individuals and and as a 'couple' (backstories, for one thing) that even though what we did get was great, it didn't feel complete. 
 Looking forward to the next book. 
 ------------ 
 I rather expected more from Dallas and Lex's story I think.