I have used previous versions of Office since time immemorial. All the programs adhere strictly to Apple's Platinum Appearance specification.
Dialog boxes have buttons in the proper places, and buttons which are named properly to boot.
I'm happy to say Office no longer feels like a crappy Windows port. And, all the programs launch quickly and have a snappy, crisp feel to them, even on slower PowerPCs. Other great features include drag and drop installation and self-repairing applications. To install Office, simply drag one folder from the CD to your hard disk. After that, if you ever inadvertently delete a component of Office, it will be reinstalled automatically the next time you launch an Office program.