I gotta chime in. CCC is really handy. I used it to back up my home directory onto my iPod *and* to make my iPod bootable. It's slow, but kinda cool in a geeky way to be able to boot off your iPod. Since my music doesn't come close to filling up my 20GB iPod, it's not costing me any functionality.
It can actually be useful if you're one of these people who needs to repartition your disk in order to install Linux or some other OS.