About 15 fps on GTX 950 with terrible input lag. Work-of-art level of performance issues, it's like barely playable at all
Hopefully that does not scare off too much people.
Just for the record, I was able to make the playing experience much better by tweaking everything I could in Nvidia control panel for performance and input lag reduce and it kinda helped. So it is playable if one really wanted to play it (like I did)