This is the first post I am trying to write using the Gutenberg plugin for WordPress. I am going to keep this short and sweet as I am testing it as well. You have to try this plugin demo understand the potential of this plugin. So far the demo is great. For a developer preview, this is mind blowing. These are very early stages of development and this looks very promising for the future of WordPress.
If you are a WordPress developer and you haven't tried to use this plugin to test your plugins/themes, you should start today. It is pretty stable considering it is a developer beta release.
You can get the plugin here. Don't go by the ratings on the plugin repository. The development of the plugin happens on github here and feel free to contribute to it.