Installing Mavericks was rather painless and speedy (for an OS upgrade) affair. Not a big deal, but when it restarted after the update, both my monitors (MBP LCD and external) were using incorrect display profiles. Also, getting the Dock to pop up (I have it setup to hide) can be erratic - sometimes it pops up quickly when I move the cursor to bottom of my screens and other times it needs an extra "tag," so to speak, toward the bottom of a screen for it pop up. Not sure if this is because I have a dual monitor setup.