SD is not good backup software imho, backup software should never change the source disk, but it does, if power runs out in the middle of a backup your system disk will be seriously messed up, this software messed up my system and had to reinstall from scratch. Good backup software doesn't change the source disk.

Errors were being reported from OSX and I had accidentally thrown away my OSX disks for my new Macbook Pro in a recent house move. I needed those disks to be able to repair the boot disk. Fortunately I use SuperDuper weekly and when it does a backup to my external LaCie disk it makes it bootable. I was then able to boot from the external disk to repair my Macbook Pro disk - hooray!!

Last week only a single app had crashed so severely that not even a uninstall/reinstall fixed the problem! A complete rollback to a backup taken with Superduper a week earlier solved the problem. I finalized the process by updating my home folder with the Time Machine backup.

I also love that I can take my Superduper backup to another Mac and continue working where I left off. Great comfort.

When Leopard came out, I tried to replace SuperDuper with Time Machine as my main backup solution. Time Machine is much faster than SuperDuper's Smart backup, but it does not work transparently; it excludes many large files that would slow it down considerably (VMWare virtual machines are an example), and furthermore, it does not support backing up to anything but a disk or network partition. I like to backup to encrypted disk images, so I went back to SuperDuper.

I suspect that a future version of SuperDuper will interface with fseventsd, like Time Machine, and that this will speed up Smart Backups by orders of magnitude. I would gladly pay for a new version when that happens.

geira, SuperDuper does far more than a simple file copy. I use a Firewire WD MyBook Pro and a smart backup takes around 30 minutes, and a full backup every so often takes a few of hours.

Has some nice features, but unfortunately is slow as molasses. Taking a full backup of my MacBook Pro onto a new WD USB MyBook before Leopard installation, Finder took 20 mins or so for 30 GB of audio, but in two hours Superduper only managed 6GB of my home dir. I then gave up and used tar. Now Time Machine is zipping along in the background, having copied 9 GB in about 10 mins. Prior backups to Firewire disks have also taken the better part of a day, so this is definitely a sub-performer.

Great product and superior support.
It wasn't working in the morning and I sent in an error report. When I got home that same night I had a complete solution to the problem.
The support in itself is worth the price.

Please don't download from the link, below -- use the standard download link. Connectivity problems have been fixed.

Leopard-compatible version 2.5 is now up - sadly, Shirt Pocket's site seems to be down.

This mirror, which I got from MacUpdate, might be helpful:

http://homepage.mac.com/bruce_lacey/.Public/SuperDuper!.dmg

If you're looking for a backup solution, stop looking. SuperDuper! does the job.