Backup when not logged in
 

I went with SuperDuper after deciding it's not worth dealing with Apple's pretty crummy rsync implementation to mirror drives (sigh).

The one feature I'd really love to see is the ability for schedule to work without login. I've got a headless machine running as a server. Mirroring between disks is a great backup solution, but only works when logged in (meaning if there's a power outage, manual intervention is necessary for backups to start again).

The ability to use the engine on a cron (command line, rather than via ui) would achieve the same thing (and be really handy for geeks like myself).

Awesome program. Well worth it.