SuperDuper and Time Machine
[Time Machine’s] primary usage scenario—and the one that most demonstrations and documentation focuses on—to allow quick recovery of files and data that have gone missing, etc. Yes, Time Machine can restore a full system, but that’s not its strength. Doing so requires you to actually start up from the Leopard DVD (which you’ll need to have with you) and then take the time to restore the backup in full, which interrupts your workflow, requires a working, entirely separate destination device, and takes a lot of your time—at the exact moment when you can least afford it.