The only confirmed bug is the xserver-xorg symlink is missing on reboot - after installing the stack, its recommended to purge the xorg configuration files and to reconfigure xserver-x-org-lts-quantal before rebooting. Apparently the display manager can't find the X11 file hence the bug. This is the procedure to follow AFTER installing the enablementstack and BEFORE rebooting. Once done, Ubuntu 12.04.03 should be both fast and stable!
The best upgrade for Unity is drawers. Basically, they are mini panels that slide out from the launcher and can hold applications, folders and web links. You can drop and drag stuff from the Dash and drop them into the drawer. Then its out of sight and out of mind until needed. sudo add-apt-repository ppa:ian-berke/ppa-drawers Really cool if you think about it -who needs a cluttered launcher? Mrkvonic is running Precise so this is a really good use of valuable desktop real estate!
Downloaded and will be playing around with the live CD soon... A question though, why doesn't linux mint come out with updated LTS installers like ubuntu?
You're lucky Others are affected by this bug concerning unresolved dependencies. Answer #2 might be a solution. See also this discussion.