Have had a quick blast so will give a bunch of first impressions in no particular order! I've have an Oculus CV1 so already have my VR legs, although I haven't used it for at least a year or 2 so was curious if I'd feel anything untoward.
The headset really is light, and much easier to put on / take off / get into position and adjust than others I've used.
Setup is quick and easy, and everything just works. This is refreshing compared to the PC!
The face seal really does block out any light. I was doing Bathurst at night and it is pitch black inside the headset despite being sat by a window.
The back of the headset does touch the Playseat Trophy headrest, especially if you put your head back. It didn't naturally hit it for me, but it's very close and if you have better posture than me it might force your head forward perhaps.
The headphones volume was pretty low, I didn't waste time looking how to change this as I wanted to play!
All of the VR tracking etc. worked perfectly.
The pass-through camera is not detailed enough to be able to read the display on the Logitech G Pro, although it's enough that you just about know which menu item you're on in order to re-set the settings (as GT overrides them when the controller first connects)
I felt like I had small hands in game. It's hard to describe, but it felt like the scale of the world was slightly off, slightly small. I haven't felt this previously in Assetto Corsa with the Oculus, it certainly wasn't distracting or anything, but was just something I noticed.
I still feel the lock to horizon type viewpoint is nicer, for me it engages my head to move with the car, and that helps make my body feel present inside the car, as if you can feel the car move through your backside. It's also helpful with sensing the weight shift when braking, as you can see the nose lift slightly as you reduce the braking pressure for example.
I can't see any screen door effect (in terms of how I could on the Rift DK2 or CV1). It manifests as if there's sort of a layer of soft 'fuzz' over the screen, it's hard to describe once again, but day or night I couldn't see the literal black lines between pixels at all like you could on the older Oculuses I've used. It's a little bit like you are wearing a helmet and the visor is minutely dusty, the world 'behind' the fuzz looks pristine.
The way the car / race info is displayed is really nicely done, it's actually so unintrusive that initially (as in for a good few laps!) I didn't even see the gear / lap indicator floating above your main viewpoint. It'd be nice to be able to turn the brightness of the menu items down (the radar etc.) as at night in a dark cockpit it's a little bright.
The ghosting mentioned above, I didn't really notice it when just playing, it didn't stand out to me, but for example if you turn to look at trackside marshalls / crowds etc. it is very apparent.
There's definitely a sweet spot of focus in the middle of the lenses, although this is much larger and more forgiving than the Oculus, and the positioning of the headset seems less critical to hitting this sweet spot compared to the Oculus.
Overall, I wouldn't say I was blown away, but that's because there was a lot of well documented hype and I am very used to the magic of VR. The graphics are more than good enough to be immersive but I think have lost some of the 'realness' of flat screen GT7, but it's possible more exposure to VR, weather effects etc. will change that perception.
For me, VR gives an enormous sense of being 'there' and inside a car, and for me gives far more feedback about how the car is moving about and as such being able to play GT7 with a quality VR headset is a dream come true. A track like Bathurst I feel it's much easier to place the car tight up against the walls for example, and to feel how the elevation changes influence the body movement.
I'd like to be able to turn the driver off as an option, I don't feel it adds to the immersion to be honest and have historically had it off when using VR. Especially as it's only animated to small amounts of lock and the shift animation is awkwardly delayed.
Absolutely no motion sickness feeling but that was to be expected. From previous experience I'd suggest if you are susceptible or still getting used to it, avoid looking to the sides too much initially, avoid lots of elevation changes, if you spin or are going backwards etc., maybe just close your eyes until it stops, and also reversing and stopping used to still give me a slightly odd sensation for weeks and weeks even after being otherwise totally used to it.
, probably don't help my left eye is veering too the left than straight on but just don't expect it this bad, need too find what i'm doing wrong, if nothing then I'm sending mine back 
