There is a lot of controversy surrounding the new User Interface. Here are some of the arguments for and against the Ribbon.
The "Consistency" group:
Learning the new ribbon will make learning other Autodesk products easier because they all have a consistent user interface.
The "It's Inevitable" group:
We are going to have to get used to the ribbon because it's here to stay. So the question is not DO we learn the new ribbon but, WHEN do we learn it?
The "Hopeful, Let's Wait" group:
There is a lot of complaining about the new interface. In response to complains, Autodesk might make some changes to the ribbon between now and next year.
The "Productivity" group:
The new ribbon is less efficient than the old interface and not necessary for our firm at this time.
1. The first reaction is going to be frustration, "Where did my tool go? Why are the tools moving around on me?"
2. The second reaction is going to be surprise, "Is this a new tool in 2010? No, it's just more visible now because commands were shuffled around."
3. Every office is at a different stage of Revit Implementation. Regardless of how many new features there are you have to ask yourself, "Is the office ready for an upgrade? Now or later?"
4. The new ribbon is going to require more retraining than is usual for a new release.