Excellent headless CMS
This is Free and Open Source Software at its best. Directus has a great, well tended community, excellent developers, many options and lots of friendly answers to real questions. I have not found any other headless API I can self host in amazon or wherever I want. This makes for a local development cycle, short time to market, very easy to prototybe setup for example for react/gatsby apps.
The app where you manage the database still needs a bit more documentation. It does not lack features, but some features lack propper documentation. I hope to help on this in the future!
Reasons for choosing Directus
I tested all headless cms apis out there (cant remember the names of all of them). None of them fit my use case.