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.

I have been using SD for about 2 years. I trust completely this robust and high sophisticated app which never betrayed me. Easy to set up and easy to use. Just schedule the copies (carbon or dedicated ones), turn the external hard drive on and relax. I do recommend warmly.

The sparse backups are great. Just updating the backup once a week only takes 15 minutes maximum and it seems happy running the background while I continue to work. Worth purchasing.

My harddisk crashed! Superduper saved my life research when I realised I had backed up a week earlier. I just restored it. Simple.

So far so good, and not even a need to go to tech support. That's always a good sign.

I accidentally wiped my Powerbook a while ago (don't ask!). SuperDuper saved my life. It was easy to restore my hard drive to the state it was previously in before I stupidly wiped it. Great program - just remember to backup frequently