I saw my friend play it when it came out some months ago and it seemed like the controls (using an xbox 360 controller on a PC) were responsive and the visuals were badass. Voice acting was a bit lame but the game looked interesting enough.
I almost bought it purely because of the Exterminatus DLC but I never got around to it... plus I was saving my money for Skyrim. I'll have to check Steam more often for deals or maybe even Amazon. I've had a lot of luck with buying used games in the past (some were even brand-spanking new) so I might stretch my luck a bit further if I can.