Updated to Mavericks DP2, definitely the smoothest this computer has been in years. There are definitely a few things that I don't like.
The new gesture to bring up the Dock in Fullscreen does not feel right, I never accidentally pulled up the Dock in the past so I don't know why the felt the need to change it, but I feel like I have to be very careful to bring it up, otherwise it doesn't work.
What the hell is this?
They did something to the font rendering, and the system Japanese font is awful. Is this a ploy to make people purchase a retina display?
Some of the apps are ugly, Notes was better before, Calendar is okay but I really didn't mind it before, I guess the changes in week view are worth it though. Reminders is just completely out of place now, Contacts is as bland as ever, they should enlarge the contact photo well so that the app doesn't get lost on the desktop.
Really like the new Activity Monitor and have been waiting for them to do something to it since Tiger, but am confused on how I should read some of it. The piechart memory use Dock icon I use frequently, however it does not budge in Mavericks, and is reduced to only 2 sections.
I assume blue is in use and green is free, but Apple got rid of the key as well. Also curious as to what units "Energy Impact" is.
Drag and Drop between tabs and spaces could use some work as well.
Overall the system feels incredibly quick on my 1st gen Al MacBook.