I dunno.. They are expensive yet and I'm not sure media is all that cheap yet. I have a tape drive and it works fine, but can't stand to have it run while I'm working. I set it up to back up stuff overnight and it works fine. It's slow as mollassis though.
Another option is to use the backup software with a cd rom. It may take more cd rom's, but it's a lot cheaper right now. When you can get cdr's for as little as .10 and burners for free after MIR, that's a good deal.
OTOH.. If you have the money, why not?
Sal