I have dual boot installed JJ and KK on 2 desktops and 2 laptops. The only time it worked out of the box was KK on a Vista laptop and I think it is still running under Vista. So that is 25% success rate.
Once the Live CD wouldn't even recognize the mouse on the desktop, and I blogged here the rest...Yes, I searched for the solutions and it is actually surprizing how few are in recent times. And most everybody had the same problems (like screen resolutions)
I really wanted to love Linux but it is just not worthy and not ready for primetime. They shouldn't try to make a new version in every 6 months, just work on the one that is current and make a new one in every 2 years.
And as for the eyecandy, it is pretty, but it takes me to the same internet as anything else does. The only thing I liked was the speedboost and I still use it for that purpose on the laptops, although the Vista has pretty much the same speed.
Maybe I will give it another try in 2-3 years.
P.S.: It was certainly cool to be able to cruise the web with an old computer, without a HD!