I had an old Macbook White early 2006, which has worked like a charm for me for years. Last fall 2013, however, I decided to get a brand new fully specced rMBP 13". A huge upgrade obviously, and I loved it. But after a few months, I started to get annoyed with the keyboard's "clicky clacky" sounds. I had tested a few MBA's and absolutely loved the keyboards. I was under the impression that MBA and rMBP had the same keyboards. It turns out they dont! The rMBP keyboard has been made with extra mechanics/harder springs, to make it more durable. The result however, is that it has slightly more "resistance" and is a little more"clicky" pushing the keys. While this probably won't be an issue for most, it became one for me. Try and line up an MBA 13" and a rMBP 13", feel out and listen to the two keyboards. They differ markedly. Anyway, I ended up selling my rMBP 13", went back to my old and battered Macbook White, and would wait for the rumored 12" Retina MBA. It didn't arrive with the WWDC, and having decided that if it didn't, I would get a current fully specced MBA, I was thrown into the mental hell of decidiing between an MBA 11" and and MBA 13". I could get into a huge argument about waiting even longer for the rumored 12" Retina MBA. But while I'm sure it will be pretty cool, it might have a form factor I dont like, less battery life, first edition bugs etc. I need a computer now, and have to act on what I DO know is there. I am gonna use this comp on the road alot, so for the longest time, I was opting for the 11". It would be perfect for my backpack and for the road. But then arguments on getting the 13" started to fight back. Longer Battery Life Better form factor (for me) SD card access Bigger screen size Only a few 100 grams heavier It will be my main comp I dont have an external These last two arguments put the final nails in the coffin for the 11". There will be moments when I would have loved to have the 11". But in the long run, wanting to keep this, not just for traveling, but as my main comp while at home, I do believe this is the stronger move. I might too be looking at the rumored 12" Retina MBA with longing eyes, when it finally arrives. But Ill be happy knowing that I have bought what is generally considered to be one of the best laptops ever made by human hands.