When using this tool, you get a webpack.config.js that is created just for you. It's a great starting point for further development. The webpack.config.js will create an optimized bundle based on best practices. Advanced optimizations such as code splitting is not (yet?) fully supported with this tool.
Found a bug or want a feature?
Contact me on twitter or file an issue or even better make a PR on the github repo. Yes this is open source.