I ordered my DK2 on Jun 16, 2014 and received it (in the UK) last friday (Sept 5th)
Never tried any VR before and the moment I sat down in the table demo scene a smile wrapped round my head and I started giggling like a little girl ...and then I tried ED and I nearly started cheering when I looked around my cockpit. It doesn't look good in the distance but the foreground is amazing. I think the panel resolution will need to double to really start the VR revolution going but it's a brilliant bit of tech.
I tried Cyberspace (roller coaster) and that is a real stomach churner. Was closing my eyes like a wuss
Also tried HL2 a few times but the movement speed makes me feel ill pretty much instantly.
Anyway, back to ED, been playing it for a good few hours and it's a great experience. Only downside is the lower FPS in and around the starports and ringed planets. No matter what settings I try I can't quite keep to 75 fps (r9 280x, i5 3570, 16gb - also tried my 7950 + 280x in crossfire but same deal) and so experience the disorientating judder.
Also the the chromatic aberration on the stars makes them look like horrible big triangles. I applied the fix but it's still very noticeable
Anyway, not complaining, it's a real buzz to play. Think I may have played it a little too long as my vision is a little floaty lol