I got my O+ last week and have been flying in VR for 30 minutes a day to slowly get used to the sensation. I was not overly impressed using it in the A-10C or F/A-18, as the degraded graphics makes it hard even to spot an airfield from 10 miles out, let alone spot enemies and other stuff, but was so blown away when I used it with the Huey. That's where VR really shines, at least for me. I'll keep it just for that.
On the technical side, I did all the suggested steps with WMR beta and SteamVR beta and have solid 45 fps with PD of 1.3 in Caucasus with my setup.