The biggest advantage of the new Office is that it runs great on the MacBook Pro. After experiencing some crashiness with the old Microsoft Word, I decided to make iWork my default word processor, but compatibility still takes an extra step (you have to Export to Word). My wife is an Office for Mac veteran, and while she hasn't experienced too many stability issues with Word, she finds instability when working in the old PowerPoint, especially with Excel data. She's committed to Office for the long haul, never gonna touch iWork, and I like Office features, like that damn style paintbrush, which comes in handy when you're doing a lot of cut-and-paste. So in my house, a new Office arrival is good news indeed. Needless to say, this Office suite, even in beta, has been nice and stable to date.