I evaluated Europa recently running inside some k8s clusters.
Things I liked:
Very good looking interface
Easy to run a registry inside the app
Things I disliked:
mysql dependency, would be nice to support integrated sqlite
No "insecure by default" option. You have to generate a token and then login which is annoying. Also every image pushed is private by default and there is no api to make it public. The registry runs inside the cluster so the security is not needed for my use-case