I am disappointed. I spent a lot of money on this rMBP. It's the mid-2012 model, with 512SSD, 16GB RAM, and 2.6 CPU. The screen is what sold me, as I am an illustrator and work in Photoshop all day. (Photoshop looks fine on retina, and not nearly as terrible as everyone makes it out to be.) But the performance is jerky and not smooth. Switching between desktops is jerky and even opening Finder is often not smooth. When I got the laptop, the Backspace key got stuck after it was pressed, though it seems a bit better now. And the Caps Lock key doesn't turn on when I press it. I have to hit it hard. It's moody and sometimes works. I've looked at the Airs, thinking that they're better in performance, but they're too small. I can't go smaller than 15". The MacBook Pros are being phased out and are a bit clunky. Although, if they're comparable, performance-wise, to the rMBP, then I might consider. But their screens aren't as good. I suppose I'm going to swap for another rMBP and hope for the best. I'm really in a pickle, and I'll have to wait a few weeks for a new machine. Bleh. It's a lot of money for what is really just a great screen. The performance is certainly not worth the cost. I'm pretty disappointed.