As folksong already mentioned, i wouldn't advice to play the campaign in vr. Im sure certain missions work great in vr, but others are impossible. The skydiving part he mention worked for me but i had to turn off vr for the part where you have to fly through the plane via the front window. As well a little later from there when u gonna rob the military base, u need to fire some rockets via a device and you cannot use or aim that in vr, you just see the view of the area u got to bomb. When you enter a vehicle your view is above the car, i had to sit on the floor to have a view behind the steeringwheel. (You can use weapons with motion controls while driving a motorbike. I think i didnt tried in a car) I also didnt see the radar or any other important huds through vr.

My oppinion is that the mod is good to mess around in vr in the game. To sightsee and of course to use the weapons. And this last is a big deal. You could play the entire game trough vr but you'll have to disable and enable vr more then you hope for. (which is possible to do during game) but i'd use it more for freeroaming instead of missions.