This is a beta product, and we put that up on the docs so people can understand in its current state what it's capable of and what it isn't. One thing we didn't put in the docs is that we can change the target of a new system to an old server's backup. So in the case of your server going up in smoke, you would simply open a uservoice ticket (or email me using my profile info), fire up a new server installed with JARVYS (disabling the cronjob until you're restored), and we'd change the target UUID to that of the new server, allowing you to restore from your old backups.

Soon we will have it where you can simply select any other server from your account to restore from it to any other server on your account, and the docs will be updated with how to do it.