I'm running the server since ages and didn't saw big issues so far. Updates a usually easy but once I took me an hour to understand, find and fix Experience and upgrade hints for Server upgrade to 2.14.2-beta I have it integrated with my traefik reverse proxy so it's exposed publicly with proper TLS cert. Setup is easy if you are not bloody beginner with docker.
The only big shortcoming remains SSO integration. LDAP was added shortly but - I hope more modern OpenIdConnect will follow soon.