My experience is similar. The Kubernetes community is really helpful and active on IRC. Getting started is a matter of hours, not days. The Kismatic packages are a big part of making that easy.

I really like that Xoom is taking a phased approach with their service discovery model and not completely throwing out ZK right away. Shows that you can gradually bring Kubernetes into your environment without needing to re-think the entire stack, thanks to K8S's modular and extensible design.