Both PCs are backed up to the shared disk on the router. I have a laptop computer and my partner has a desktop, and we are both connected to a Linksys WRT350N router with a shared 300 GB Iomega disk on its Storage Link USB port. My own installation at home is a good example of this. Combined with large capacity backup media, such as USB disks or network storage, this makes it very easy to ensure that you are well prepared in case of accidental file loss or catastrophic failure. True Image Home also includes backup scheduling capabilities, to run automatic unattended backups at specific times, days, intervals or based on system events such as log on / log off.
In addition to the obvious use of a backup archive - restoring it to a new computer or disk - Acronis also includes tools to let you explore an archive from within the True Image program, and to actually 'mount' the image as if it were removable media, which you can then copy files and folders from with normal utilities - a very nice touch when what you need to do is recover just one file or folder.