It probably very much depends on what you are using your computer for. If you are just living in Chrome and use Google Docs and Mail there this will work just f

It probably very much depends on what you are using your computer for. If you are just living in Chrome and use Google Docs and Mail there this will work just fine. If you are someone who has tools set up, apps not from the app store, come custom dot files, your shell history and environment variables this will not help you at all and getting up and running after a device got lost / destroyed will take you a day. Even if it's just simple things like your system theme / Dock positions of your apps. You could probably fiddle and symlink things and hope everything works but it's not a "log in and have your device be in the same condition as before" like you'd get from an iOS "Restore from iCloud" functionality.