I like that it is very easy for me as an administrator of our server farm with many servers in different locations around the world (in various states) to manage them all from one place - no more having to go out into each location! It's also nice because this allows us remote access via VPN or SSH if we need too without needing someone physically present at every site. The UI could use some work but overall not anything major. We are solving problems related to scaling capacity across multiple sites while maintaining high availability/redundancy using virtualized instances running XenServer 6u2-3a5xl4r1n0w7gfqd8h6p9sjyvzkcvmtb.