Tested the Steam Controller today, and other than the fact that I didn't hold one for so long, it works perfectly. Didn't even mess with the fuckload of settings, yet. What I was suprised by, though, was that I am a complete noob at Dark Souls after not playing for a year. The muscle memory either vanished or it's because of the different ergonomics.
The controller isn't so good at Warband, though.