David Hershey did a really thoughtful and candid review of God or Godless. You can check it out here:
http://davehershey.wordpress.com/2013/05/08/god-or-godless-review/
While he reads the book as a Christian, David strives to give John’s atheistic arguments their due, and ends up thinking that we both put on a strong case for our perspective (with which I agree). He concludes:
Overall, I found this to be an excellent book. Its brevity could earn it readers who would not want to slog through larger tomes. Likewise, the debate format is inviting and makes for informal reading. Both authors know their stuff and manage to pack a lot in to the space allotted. I could see this book being used for discussions, whether in churches or coffeehouses. I work in campus ministry and I plan to highly encourage my students, Christian students that is, to read this book along with their peers.