I actually despised Office 2010, it was much less intuitive than Office 2007, Microsoft moved everything around and I couldn't find anything because nothing was in any obvious place to look, it was all hidden somewhere in heiroglyphics on one of those idiotic "ribbon bars". Office 2013 moves things around also, but it's far more intuitive about how it operates. It operates more like a tabbed browser application than like the mess that was Office 2010.
Word of warning for those intending to upgrade from the preview to the release version -- the mail profiles in the preview version do *not* cleanly load into the release version. Weird things happen with complex mail profiles. My recommendation is that you uninstall the preview, delete the mail profile you used for the preview version, as well as the mail backup files on the hard drive, and start over from scratch re-entering your account information in a fresh install. You still delete your profile through Control Panel->Mail like with previous versions of Outlook.