I haven't used Word much at all since the ribbon interface. Like others, for whatever reason the ribbon makes doesn't work for me, neither cognitively or via muscle-memory. The categorization doesn't help me predict where to find something (fails "new user" ease of use), nor does repeated use make it easier or faster. And of course I don't use it (or windows) much, so I don't think in Microsoft(tm) English, adding a minor layer of translation for some jargon.

I have to use Excel enough that I've finally rote-memorized where frequently used things are. But when I have to find some tool I don't know where is, it is faster to google for instructions than hunt around the application itself, so I do that first.

I'm sure it is fine if you live in MS-land. I don't, and it fails for this casual user both for discoverability and streamlined use.