I always hear about this or that Great Visual Improvement and Experience. I really don't care. My 'experience' is so customized, I don't notice 'improvements'.
Having said that, it took about 20 minutes to upgrade, much like the original install. It was flawless. The only way I knew it was different was that a taskbar had a slightly different font. There's a new wallpaper (YIPPIE!). Of course, I might not be the one to judge - look at this damn blog.
It works. Might even be faster. Seamless.
I love Xubuntu.