One question before i buy my new Macbook Air. If i have a Windows based laptop with Microsoft Office 2010 and a OSX based laptop with Microsoft Office 2011 for Mac, will they be cross-compatible - meaning if i start a piece of work on the windows and want to work on the mac at a later date will it use the same template and convert over - or vicer versa. Do they have and use the templates, etc etc? How different is the UI, easy to learn the Mac version?