I tested the https://devcentral.f5.com/articles/f5-automated-backups-the-right-way today in my lab.
First with local storing, then scp copying over to a Linux box. After a bit of struggle with ssh keys (have to be rsa not dsa for this to work) got it working well. When importing the template there is an ltm log warning message, however the import is successful and creating the backup app service with it goes ok. What I miss is logging when backup has been created/copied to target successfully. If the backup script fails, there is an error message in the ltm log.
Implemented it to my customer later today and seems to work fine. Changing backup schedule is very easy with the iAPP.