The install went through without any problems and all the user accounts and services were upgraded with out issue whilst maintaining all of our settings. We don't upgrade the server very often and like to lag behind the latest versions of everything but even so it was great to be able to use it's newer features right out the box.
We came from a Microsoft Small Business server and have been running OSX Server for years now with none of all the issues we used to get with MS products. This server just runs and runs faultlessly year in and year out. Great Value.
Installed without any problems using VirtualBox on Mac Pro 4.1, Mavericks. Can now run Freehand via Rosetta. (Bug in VirtualBox causes double cursor at present, but this should be resolved in next update.)