So I purchased a new Late 2013 15" MBPr. I recently sold my late 2011 MBP for a decent price considering and I wanted to point out some of the differences I noticed... 1. Thinness. Man this thing seems so delicate! The display is super thin and I really feel like I have to be careful not to crack the screen as very few have reported. I do not know if a case will help or hinder in this respect... 2. Retina. This thing sharp! I feel like this is the way MBP's should have been from the start. There are no imperfections to report here. Darker blacks and reading is really easy. 3. Keyboard. The layout is pushed to the left a little bit. I think that this was to accommodate the power button being integrated. While I can appreciate that and I will get used to it I do find it irritating right off. Also, I don't know why but I feel like the keyboard overall has delicate feel to it. I think that this may be because of the thinness but also because there is no longer a SATA and OD but typing feels violent lol 4. Trackpad. The trackpad seems to be having an "oversensitivity" issue whereby when I tap to click the cursor moves " " that far to the left rather then click. I have had to tap three times before successfully getting a tap to click. This has happened only a few times and it may just be acclimation to the new keyboard layout or height difference/angle or something but it still counts as a difference. 5. Sound. Holy crap what a difference. The sound is just epic. 6. Speed. Near instant everything. What Mac are you coming from and what is the biggest difference that you noticed?