We use Scale at Royal ISD. We have over 25 Virtual Servers that are Windows and Linux based. It is used by teachers and administrators in the district and is maintained by our IT department. It has helped with storage and redundancy as we have three in a cluster. It has allowed us to get rid of many old pieces of equipment to free up rack space.
All of our SQL servers and Domain Controllers are on Scale. Never have we had an issue where speed or performance is a problem. Our security cameras are all on Scale as well, and we have over 250 cameras in the district that perform flawlessly.