I have also been getting problems with office 04, if i open a document from quicklook I can almost count on it crashing. however as the other gentlemen was saying, I don't' find the eye-candy to be a HUGE jump. it is cool, but it's nothing to really boast about.
the Features that I'm enjoying are:
-Quick look, need it to quickly go through school assignments.
-the new widget maker
-the new Ichat, already tried a presentation in there.
-Notes, very useful, only hoped that they would have synced notes with the iphones notes
-new Mail is cool I guess, I use it a lot.
thats about it for the OS itself, besides the other applications that I use everyday
-and a bit of spaces, but not too much.