I like the look and sound of it. It caters to a different site owner than say BackupBuddy, which I also like the look and sound of.

$300/yr (riffing off someone's earlier comment) is a drop in the bucket if the site is making tens of thousands of dollars a year (or more), especially for the cloud-ey nature of Vaultpress. Having it automatically, and incrementally backup to resilient, replicated storage online saves a lot of hassles.

For my smaller sites no doubt BackupBuddy and email/FTP to get the backup file off-server will be fine.

The hot updates also interest me. Frankly I'm still disappointed that WP doesn't include at least the *option* to do automatic upgrades. I understand the risks and still want it.

In the IT world we went through similar resistance to Microsoft's automatic Windows Update options when they first appeared, but the truth is they solve more problems than they create.