Been beta testing this for a bit and am downloading the official release now to see if they've improved it at all. General impressions were that it is a huge step forward for those that need role-based administration, hated the mmc console, and think there will be MANY applications requested for the BB platform by their end-users.
MDS was a little tricky to install in Beta (I have a remote SQL server with named instances...the wizard didn't allow for that, but there was a separate MDS install after the wizard completed that allowed me to go back and change it) and I never did get web browsing through the MDS browser to work, but I can't wait to get the GA code installed and poke at it for a week or two before rolling it out (I gotta test first...2400 or so very vocal users). At least now I'll have full T-Support to help work through the little bugs.