Like everything Mac, you plug it in, turn it on and it works. Its just like the old helpdesk joke to the kid, "Tell em to buy a Mac, its a computer for Id..., Mummys and Daddys"
There is plenty of cheaper ways to run backups on any OS, but that TC thingy is pretty functional. Especially as you can hide it in a cupboard somewhere and when crooks pinch your shiney Mac they dont nick the backup as well.
I dont know how it compares to the One Touch portable hard drives though. I am still using the old fashioned backup system.