The ability to test DAGs locally is second to none. You get complete exposure to what the DAG _should_ do locally so that there are no surprises when you move onto the staging or production environments. Review collected by and hosted on G2.com.
Astronomer forces you to learn Docker. The curse here is that you may stumble upon a strange error message when running astro dev start from the command line if something in your Dockerfile is not correct. Review collected by and hosted on G2.com.
