Well, I am on my 4th rMBP. #1 - Horrible ghosting right since day one. (LG) #2 - Backlight bleed was awful on the left side. (Samsung) #3 - Came with a nice dent in the bottom right from the store. Noticed immediately upon opening. When I got my 4th (Samsung), it was good except for some backlight bleed on the right side... Which I could live with. No ghosting whatsoever. About 2 days ago, the ghosting has started to appear. Yay. And I am 100% sure it was not happening before. It seems to be getting worse over the last 2 days, and I am out of my return period. Yay. So my only choice is to bring it in to get fixed, and give up this MBP for awhile. Anyway, the point of this is just to serve as a warning - while you might not have ghosting initially on the Samsung panels, it may show up later. (And my first panel was an LG - so ghosting is definitely not limited to one or the other.