I've had to send 2 of the refurbished units back, but Apple has been very generous about it. One had the intermittent black flash, one had an uneven backlight from left to right. They will certainly take it back for these issues. Just be prepared to possibly go through a couple of annoying exchanges before getting a good one. I think that maybe the refurbished ones have imperfections that are much easier to overlook when going through the refurbishment process. Not sure someone who's testing computer hardware all day would necessarily notice a color issue. That's my take. But I will say the 24" ACD is the best monitor you can possibly buy (if you don't work near a window). Very happy with it.