I've briefly tested it and it works reasonably well but you have to make some adjustments. First of all you should disable Screen Tilting, Motion Blur and Weapon Sway. When they are enabled, shaking of the screen could make you easily sick in VR. Also, when I was playing with default speed 30hz sometimes there was a stutter, so I had to increased it to 35hz. And of course the world scale should be increased to at least 48 from default 32, otherwise sprites look gigantic.