They're still working on the sync features of Windows Office 2010 for some mobile devices so keep that in mind before you switch, or do as Southie suggested and keep both versions because that is one situation that the 2007 version comes in handy. I find that Outlook 2010 has less force closes than the 2007 version. I haven't done too much with the other parts since I've installed it several months ago (the beta version.)