@TheEmuIt is a lot more convenient to use than rsync.
Surely I wouldn't disagree with you about that either. But with rsync there is nothing to set up,
once the origin and destination paths have been determined,
you pack that Information into a Shellscript, make it executable, and you are good to go.
And I try to do as little as possible with a GUI-App,
this is a lot more convenient for my personal Workflow.
It is not primarily a backup program, it is a file compare and update program that is used interactively.
Rsync does exactly the same including a Backup for your Data,
but anyway i only wanted to share my experience.
And everyone should use what he feels most comfortable with in the end :)