I backed it and have played it at a couple of cons. It looks like a nice break from the grimdark world that is pretty much every other minis game.

Mechanics wise its really no more similar to Malifaux than Malifaux is to say... Warmachine. Malifaux just uses the card flip mechanic to replace dice for randomization with the added cheating and soulstone parts. The Relic Knights cards are resources that you have to spend to do anything. There are 6 colors in varying amounts on different cards. So you might need 2 blues and a green to make a thing happen. If you don't have the resources to do it you can't even attempt it. You have to figure out something else to do. Its pretty different from anything else out there which is another reason its grabbed my attention. It also doesn't seem nearly as complicated as Malifaux which makes it a better side game for someone like me whose brain is already too full of warmachine rules.