I was impressed with Norton's Unerase. Despite the widespread panning of Norton Utilities for OS X, Unerase always did what I needed.

Now, having finally outgrown Nortons with an upgrade to OS X 10.4, I'm even more impressed with FileSalvage.

It found stuff that Data Rescue II never could. And it displayed results that made sense.

The ability (in Expert Mode) to specify the file type you're looking for -- be it audio, image or whatever -- means it's quicker. It doesn't spend time looking for deleted files you don't want to undelete anyway. It doesn't give you a huge list of randomly named files to wade through. And it allows you to preview many files, to check they're the right ones, before recovering them.

So cool!