Absolutely! We recommend adding Content Sync to your regular test environments (usually called “dev”, “test”, “QA”, “stage” or “UAT”) to ensure the safety of all deployments. That’s why testing with Content Sync is 100% free, allowing you to connect as many test sites as you like completely free of charge.
We are using tons of automated tests to ensure Content Sync always works. But with Drupal there’s really nothing that you can’t do and so it’s simply not possible to cover all potential circumstances. If you are using Content Sync in an environment that requires >99% availability of content synchronization features, we recommend adding automated integration tests to your own test environment(s) to increase your release confidence. We’ve set up a lot of such tests already so we’re happy to help you with that, too.