I've been using it with Cattle for more than a year now, I've saved thousands of dollars in PaaS bills thanks for my little Rancher cluster. I just setup a new Rancher 2.0 cluster controlplane and dashboard in Scaleway Paris with a Worker in Digital Ocean NY. I'm starting to migrate all my apps from the 1.6 to the new cluster. I haven't tried the new CI/CD thing, but it looked great in the training sessions.