I get light stuttering, and it simply makes me nauseous after 5 minutes. It's hard to explain, but my fps counter says 90 fps (with no major dips), but it sure as hell doesn't feel like 90fps. I've played gamese at 30fps that felt smoother than this.
And this is with the mipmapping disabled, running on SLI 980.
Among other things, it took me forever to figure out some other issues I had with the game. I have a 21:9 monitor, and the only way I could get it to not stretch 16:9 was to use borderless window mode (even setting the in game resolution to 2560x1440 stretched it out to the full 3440x1440, even with my scaling mode set to "Aspect Ratio" or "No scaling" in the nvidia control panel). I'd happily play in borderless window, but I lose FoV settings, and it doesn't respect the vsync setting. I'd rather play with vsync off and get the tearing than to play with the input lag. In borderless, my fps is locked to 60.
On top of that, in borderless, I have to turn AA off, otherwise I get visual artifacts like screen burn in. There's probably a different term for it (although I'm not sure it's even common), but if you look at a scene for a second or so, and then move the camera, you get trace outlines of the previous scene. I had this in Far Cry 3 as well, to some extent, but not nearly as bad as this. Going to full screen fixes this (or disabling AA), but I get stretched video again.
I'll just reiterate what everyone else is saying, this port is an absolute mess on the PC. I'd be even more pissed if I actually paid for the game instead of receiving it for free.
