I find the window management to be pretty terrible. I guess this is trying to bridge the beginner distro gap between Windows and Ubuntu, because I couldn't see anyone seriously using it for very long. Then again I felt the same way about GNOME3, so maybe I'm not in the majority there.
Zorin is a desktop designed to bridge Windows to Gnome 3, and does a better job of it than Pantheon.
And I'd argue KDE has a nearly identical UX to Windows in the first place. You can even get Windows-8-lite with Homerun. So if you want a fluid transition KDE is probably the best choice, as long as you don't overwhelm them with options (start menu, task bar, system tray, min / max / close in top right, have at it champ).
