Microsoft Office 2007 is a major advance. Once one gets used to the new look and feel there are significant enhancements over previous versions. Some of the main features are: instance search in Outlook, enhanced web and collaboration features and the general feeling that Microsoft has got it right with this version. Although there are new document formats Microsoft has issued compatibility tools that can be applied to previous versions to read the new formats. In our opinion anyone purchasing a new copy of office should buy version 2007. If you are running office 2003 there is not a strong business case to upgrade at this stage. Microsoft office 2007 is available as a 30 day trial