Oh my god. I got the rollercoaster working with it and that was incredible. Leaning over the edge of the coaster and looking down was terrifying. It was also really bad when it plummeted straight down. Some bits made me jump, but nothing made me want to scream or anything like you see in the videos.
Also, about the pixels, I saw none at all during my time using it unintentionally. If you come out of focus and look for them they are very clearly visible, but if you just relax your eyes they can't be seen.
I did get a headache after that, and I'm gonna go rest now. Everything I read said that if you tried to push through it you'd be sick for hours, and you just had to take a break once it started.