Just picked mine up, and had a bit of fun just setting it up, leaving DCS for last. My rig is only a 3700x with a standard OC'd 1080 GTX but it seems to be quite smooth without switching on reprojection though may change during moments of high activity. Not too fussed right now because all I want to do with my modules is to take off, fly a circuit and land.
Funny thing - at first I wasn't too impressed with the clarity as it was a bit blurry. It wasn't three hours later that I realised I have yet to remove the blue protective films from the lenses! And yeah I can definitely see the difference between this and the Rift S and PSVR - even with my lowly rig.