Retrospect tells you if a script is valid or not. If it is not valid it will say that it is not ready to execute. You can designate a computer to run Retrospect as a backup server. This allows the backing up a multitude of computers over a network, including PC's. A backup server is also a good idea for those who have laptops, as the server will automatically backup any laptop as it is attached to the network.
Retrospect is intelligent.
It will only backup computers who haven't been backed up recently, and will queue computers so that those who have been backed up least are given first priority on subsequent backup sessions. There are some other features of the Retrospect package that bear mentioning. However they are not part of the core program's features. But they do make your life a little easier. Retrospect comes on a bootable CD, in case of system crashes.