I had ordered a late 2011 15" 2.4GHz, which was absolutely great. That is, until I noticed the backlight keyboard wasn't lit evenly, and the HDD sleep indicator was really dim. I called Apple, they immediately told me they would send me a new one the day after (great service, Apple ). So here I am, typing on my new MBP. You might think: what's so special then? Well, the very first thing I noticed was that both MBP's, that should essentially be the exact same models, were actually completely different from one another. Since I can still put them side-by-side, I decided to do a little screen test. What an incredible difference, I am really genuinely stunned by this. The new MBP seems to have a much, much brighter and more vivid screen than my previous one. Furthermore, the new HDD is near-silent, compared to the really loud HDD on my old one. Even the "color" and overall quality of the aluminum body was better on the new one. It is also much cooler, running about five degrees C below my previous device. And if that wasn't enough, even the trackpad feels completely different on both devices. For what should be the absolute exact same device, how come there is such an amazing difference between the two? I am really puzzled as to why Apple maintains such inconsistencies within the exact same product line.