From the Apple website regarding Time Machine:
Set it, then forget it.
To start using Time Machine, all you have to do is connect an external drive (sold separately) to your Mac. You’re asked if you want it to be your backup drive, and if you say yes, Time Machine takes care of everything else. Automatically. In the background. You’ll never have to worry about backing up again.
Clearly, Mossberg's issue is with network backups. Doesn't apply in my little office, so his...