Wow. I had been manually 'syncing' important docs and flash drive packages (I work in IT and keep different malware removal/enterprise/open source software packages on different flash drives). Now I can just update the various folders on my MBP, and as soon as I plug in the flash drive, it automagically updates everything.

Fast. Very fast.

I have backups from my iDisk to my windows network share at work and my local backup drive at home - works perfectly for the most part, and tells me exactly what went wrong when it doesn't.

The 'Trial Sync' feature is indispensable, and the 'Readiness state' clearly lists any problems one might encounter due to different filesystems/permissions, etc.

The UI is excellent - it takes an often complex task (any kind of sync) and makes it visually very simple, with no clutter. The main window only has 2 checkboxes (Synchronize deletions and Archive replaced files).

I have barely scraped the surface of the advanced features, just the basics will be enough for most users, I believe; but rsync veterans will be right at home.

I only wish the developer accepted AmEx so I didn't have to pay out of pocket :P

No joke, this sound processor will really blow your ears. Auto-genre switch feature needs some work though, or at least a way to pair up genres in your library with different presets.