[dnanian]

On a schedule, SuperDuper! leaves the program in the state it was found when the schedule started (assuming there was no error during copying). So, it would eject and quit in the vast majority of cases.

On top of that, scheduled copies also automatically mount, copy and eject the backup if found unmounted at the start of the schedule (in addition to quitting). So, in most situations, you don't need to set any explicit option.