I didn't run any tests or look for flaws in mine, but the yellowing was bad enough for me to notice right away on this site. I thought I could just deal with it and be happy but I couldn't unsee it and returned it.
That said, I would like to get another and I am hoping I get lucky with a better screen. I'm not going to buy and return over and over like some people do to get a perfect screen, I just want one that is useable