At my work, we've had mixed results using it in production. I'd still prefer to using to avoid Ops, but besides that Docker comes with its own bag of issues even though it eliminates versioning conflicts.

For development, on the other hand, I absolutely love it. Being able to have different docker-compose.yml files for each of my projects and being able to spin up isolated versions of database services(each with their own volumes!) has been a tremendous win for me.