We are using the CLI, but it leaves a lot to be desired. Honestly, if you want to get serious about configuration management you need to put out a Terraform provider ASAP.

The disaster recovery story in particular is very poor. To use this in production with confidence, we need to be able to spin up a brand new instance, and have a single command ("terraform apply" or equivalent), to apply the exact same configuration state (sources, destinations, connections) that was on a previously running instance.