So far, my experience with Gentoo has been outstanding. Sure the installation took a while, but, instead of finding this package to enable this and that package for something else, it was all compiled into the programs as they installed (USE flags), which has been quite a relief.
Instead of having to enable repositories and then install packages, when I was (finally) presented with a gnome desktop, mp3, dvd, wincodecs, truetype font, etc. all worked. Yes, I must say, compiling gnome with all of the default deskop USE flags took quite some time. But after hours of command line work, I was ready for a little break.
Now this may or may not be superior to how things went in Ubuntu. I still like Ubuntu, mind you. Gentoo's just different, that's all. And in a way that I like.
Probably what has attracted me most to Gentoo is their excellent documentation. Before installing, I printed out the necessary manuals to have them handy. I think that was part of the reason things went so well for me.
And this thing is smoking fast, too. The desktop is extremely responsive.
If you like Ubuntu and you're willing to learn a good bit more about Linux in general and want to explore something different, in a real good way, then I'd encourage you to try Gentoo.