Here are a few screenshots I took while I was setting up our Microsoft BPOS S+S account today, just to give a taste of how clean, simple and easy it is. My post on using MS BPOS is here.
What you see upon sign in
Adding users and domains, tracking licence use, importing on-premise users and more
Allocating storage space for services and accounts
The support tab from the admin console
Accessing AD sync, Exchange GAL sync and mailbox migration wizards