It's post-apocalyptic steam punk with psionics, but that doesn't even come close to what it's really about.
While I have a paper copy of the first volume and I'll have the second volume as well, but there's something I like about reading it in its original format, the weekly six-page issues on my screen. It's mildly unique in that it's a weekly web comic, rather than a daily; but that means one gets a whole six pages to drool over each Friday. *happy sighs*
It's Mature Content, folks. Just so you know, lots of violence and implied sex and bad language... hell, it's Warren Ellis. *laughs*