A nice touch specific to this issue is the writers subtly addressing one of the more frequent complaints about John Constantine in The New 52 and doing so in a way that makes perfect sense while opening up avenues for future stories down the road. In this case, we finally learn why John has been globe-trotting so much and not spending any time in London. It seems a curse lain by some unspecified baddie in the past has left John with a severe allergy to his adopted hometown. Even if John can find a way to temporarily shield himself from the city literally sucking the life out of him (as he does in this issue) he still has to contend with synchronicity finding a way to kill him through a traffic accident or some other random disaster.
If you're a fan of Hellblazer who has resisted the enchantment of Constantine thus far, I urge you to give this book a shot. Let it work its' magic on you. I'll think you'll find it as enchanting as I do. No bollocks.