Demo's up on Steam and (I think?) XBox Live.

Before the demo, I thought I was fairly certain I wasn't interested, but I think the demo's got me hooked enough to actually purchase the game.

Gameplay-wise, it's closest to the Batman Arkham series (at least among games I've played) with RPG elements to craft items, itemize, and level. There seems to be enough to make the player want to explore the world, and as in Batman Arkham, combat is super slick. Though, perhaps, the RPG elements are a little on the lighter side, they're still enough to want the player to discover new things.