It's very poorly implemented in my opinion. Scale is terrible, 3d is not very pronounced if it's there at all, no menu integration, have to kill the program to exit a race, no 3d mirrors.... Etc. not worth bothering with at the moment. LFS is so much better in the rift.
3D just isn't working/implemented.
Tried it again last night, managed to get the game running on the DK2 but it's in 2D.
It kinda looks a little 3D but it's not, it's definitely 2D.
Pity as the game itself is great, really enjoyed playing it early this year.
Once they sort the issues out it will be the premier VR racer.
My only worry is that they won't sort it out. The devs were pretty lacks about their support of DK1 so I hear.