I have recently installed UNB on my Atom-based netbook ( side-by-side with the default Windows 7 Starter ), and I'm very disappointed with the default interface. I really like the design, it looks tailor-made for netbooks - but it is so limited ! ( no shortcuts on the sidebar, or on the desktop; generally confusing )
I'm considering a switch to the traditional user interface, the only thing which would make me stick with Unity is if it would provide power savings over the standard UI.