It’s a very good application - Simple front end to rsync which is powerful. It hasn’t let me down, ever, and does sync backups to the popular cloud services as well as local LAN or NAS device.
It was/is buggy on 17.10 (python errors) but has been working great on 18.0x. It is the default Gnome backup utility, and as such I don’t see it being dropped upstream anytime soon.
Being simple, it fits into the Ubuntu ecosystem well, making it easy for people that just want to use their computers, do so, without needing to be a sysadmin.