Upgraded yesterday it crapped of course as all the fucking ubuntu upgrades of the last couple of years.
Installed it from zero and there is a nasty bug. If you click on install updates and other components during installation, flashplugin fails to install and it totally kills the installation which means that no grub is installed
Finally got installed. Is better but its still a poor desktop experience.
1) Nouveau is not installed by default so you don't get unity from the start but a mix of gnome panels and unity interface which sucks.
2) Installing nvidia drivers on your own doesn't work. gdm dies
3) When you click the ubuntu button, the launcher only takes a 25% of the screen which makes absolutely no sense. You can make it so it takes all the screen and shows more apps but it won't remember.
4) Ubuntu one program still sucks. I can't believe OMG said it was the best interface ever. That was an april's fools joke for sure.
5) ADD THIS FOLDER TO UBUNTU ONE -> Fucking shut up already. Having that on every folder sucks.
6) I can't really find anything special in unity. It's nothing more than docky + gnome-do in the launcher + MACOSX title bars. It doesn't innovate or does anything different than rearrange the desktop with those utils.
7) Libreoffice is really welcomed! I hated to uninstall openoffice and install libreoffice after the installation
8) Nothing else I can see that grants a new distro. Apps are the same but updated. Nothing else. Once you get past the novelty of the desktop there is nothing that justifies upgrading to this version.
So TL
R: Unity is nothing especial, graphics drivers still confuse novelty users but now more, nothing that justifies upgrading if you are ok with 10.10.
EDIT: It sounds kind of harsh but it's not. The interface works, especially for us that normally use docky and gnome-do normally. Its just that is not revolutionary or anything. For me it feels like it's my usual desktop but with docky on the side instead of on the bottom.