I'm making the switch with my customers. The consensus among them is Gnome 3 sucks and they don't want it. Fortunately they are currently running Gnome 2 + compiz + glx-dock for their basic desktop. The switch to KDE + glx-dock is not too dramatic. They love Lancelot for the menus. Initial feedback is good. I do worry that the Gnome people will ruin applications like Evolution the way they are others like Nautilus.