When Pimax was at the NY Expo, at the time I was using GearVR (w/riftcat) and the Pimax 4k. Microsoft was days away from releasing Mixed Reality and they were at the show. Now, I can tell you that the Pimax 4K makes my stomach turn due to its inherit ghosting problems. When I tried the 8K, I really wanted to see how much of an improvement it was to the 4K. People must have laughed at me while I whipped my head left and right over and over as fast as I could but if you own the Pimax 4k... you would understand why I would do that!!! It was really good. I was also really excited after trying Microsoft's Mixed reality as well for the first time. At that time I was already a backer of the 8K but I never really thought Pimax would release the 8K as stated so I went ahead and got the Samsung as a stop-gap until the 8K arrived.
You know... I did have that problem initially with the V2 for the first 10 to 20 seconds but then my eyes adjusted and the image stopped being double. The V2 model had no working IPD so people were stuck with whatever value V2 had. Don't know if it makes any difference but I have 20/20 vision.