The UI looks nice. I have only one remark to the tabbed toolbar, which I
found difficult with Office 2007 too.
The toolbar organization is different from the earlier known versions and it
takes minutes to find the appropriate function for the unexperienced. Could
we have a search box which allows the user to search for the required
function and display the findings in a yet another tab? Similarly as modern
IDE-s (Eclipse) have the ability to search for options within the
Preferences dialog by name?
Don't mess with David! Just look what happened to Goliath!™