MacInTouch has a thorough review of Office 2008. Even though there are the expected issues, Office is given a very positive grade.
Office 2008’s new Elements Gallery and integrated Toolbox make the suite’s sometimes-bewildering array of features easy to find and easy to use. Microsoft marketing often talks about making “Mac-like” applications; Office 2008 is the most Mac-like version of Office since Word 5.1 … Office’s capabilities are vast, but until now much of it has been hidden among a maze of menus and byzantine dialog boxes. Office 2008 brings it out and shows it off.
ars technica has screen shots, which show some of the “bewildering array of features”.