i use it - pretty slick
You can back up your own or to friend's machines. This gives you very effortless offsite backups. Even with the free version. A few of the controls that handle versioning and retention time are locked out of the free version.
I have my parents' computers backing up to a headless linux machine with a big hard drive in my basement (150 miles away). Has worked more or less flawlessly, it did take a while to get everything copied over and was nearly invisible in its operation.