In general, CouchDB provides relatively strong guarantees for data integrity. CouchDB’s storage model is a win on the desktop where a lot of programs could potentially be accessing the same configuration data at the same time.
CouchDB has powerful built-in replication capabilities that make it easy to sync database contents with the cloud. Canonical obviously values CouchDB’s conduciveness to replication because it simplifies pushing configuration data into Ubuntu One. It’s important to note that the replication features can be configured to work seamlessly with your own self-hosted servers, so it’s still valuable to users who do not want to rely on Canonical’s service.
