I like the changes, but...
That being said, I also do a lot of writing and report creation. They've made it a lot easier to make things look pretty in 2007, but I have to agree that some of the additions/changes are not intuitive. Took me a week or two before I realized that the little arrows in the corner of the ribbon actually opened the old context menus I'd been looking for. One step forward, two steps back til you find the learning curve.