IMO Autodesk has completely dropped the ball with the Ribbon UI. It will now take several years or more to straighten it out while our productivity drops for good. This is not what we signed up for Autodesk. Our firm of 60 seats will not be upgrading mainly becuase of the UI. We think it was a waste of company resources. No one here uses more than one autodesk program and those that use Max don't use cad in our office. We will wait for the next release in 2011 and then if things do not improve we will seriouly consider migrating to another platform that listens to its users.
Our 2cents