>>297059021
I can't speak for the visual glitches but Boneworks did make me INSANELY nauseous all through out the start. 
I could only play it 30-45 minutes at a time, eventually I did over an hour, 2 hours, and after that I was pretty ok.
Few times I got cold sweats but now I can play it no problem without feeling anything.

Have a full rendered body with momentum and such takes a bit of getting used to. 
You'll know you've got your real VR legs once you can play it without issue.