I have a rMBP with a samsung screen. It is pretty much perfect. However, in the last few days i have become very aware that the screen has somewhat warmer colors on the bottom half of the panel. I can get it changed free of charge from Apple, but no gurantee on wether or not i get a new Samsung screen or if i get a screen from LG. I really dont want to wind up with a screen from LG, and the difference in the temperature of the colors are not that big, but I am very picky about stuff like this. Any thoughts? Now to my main question: If i go through with the service, is there anyway i will notice it somehow? Like looseness and gaps or anything? Lile i said, i'm borderland OCD about stuff like that.