This is my 4th replacement Retina Macbook Pro from Apple. All the others either had quite noticeable uneven temperature or creaking cases. This new 4th replacement has a perfect (or near perfect) screen and no creaking. Unfortunately, it is louder than my first one (which I will be sending back to Apple tomorrow). Specifically, whenever the computer is under load there is a faint static sounding noise coming from the right keyboard under the arrow keys. The noise sounds kind of like a old fashioned HD but quieter and with some static added in. Now, as the noise is only noticeable in a quiet room and only when the computer is under load, I can live with it, but I want to be sure the computer isn't going to break a few months down the road because of this. I noticed that my first retina from Apple makes all the same noises as this one. However, overall they are less pronounced on the first one. I would have to put my ear to the keyboard in a quiet room to hear the noises on my old one 80% of the time. Only when it's booting up or under very heavy load can I hear the noises in my old computer without putting my ear to the keyboard. This replacement is just louder. I can hear the noises in a quiet room whenever opening a program in addition to booting up etc. Now, I thought perhaps it was the SSD so I switched the SSDs. However, this actually made the situation worse. So, I put them back. Also, whether the computer is plugged in and screen brightness seem irrelevant. The only thing that seems relevant is whether the computer is under load. So, I know this may sound like someone who is just being narcotic. And I am willing to admit that I am being slightly narcotic. I guess I just want to be sure that this machine doesn't have a problem before my 14 day window passes. So, if anyone has any information on this I would appreciate it. I would really like to avoid returning this computer, because I doubt I will get another one with a perfect screen and no creaking.