Red Hat's open source OpenShift PaaS[1] is amazing. It has all the missing pieces you need for a production Kubernetes cluster: documentation and playbooks on how to run a production cluster[2], a build system, a container registry with fine-grained permissions, application templates, a logging framework...
Red Hat is a major contributor to Kubernetes and continually upstreams OpenShift features (like RBAC - they implemented it in OpenShift first, then upstreamed it, and then rebased OpenShift on top of it, removing the custom implementation).
I'm currently looking at migrating a large enterprise setup to Kubernetes/OpenShift.
I really like OpenShift. I had a hard time grokking K8s but OpenShift is much more friendly. I was able to PoC a microservices app on OpenShift with Minishift[1]. This way you can play around with it locally and make sure you understand what you're doing. The documentation is pretty good. Red Hat has stepped up big time in this area.
Red Hat is a major contributor to Kubernetes and continually upstreams OpenShift features (like RBAC - they implemented it in OpenShift first, then upstreamed it, and then rebased OpenShift on top of it, removing the custom implementation).
I'm currently looking at migrating a large enterprise setup to Kubernetes/OpenShift.
[1]: https://github.com/openshift/origin
[2]: https://docs.openshift.org/latest/welcome/index.html