Nice to see 0.3 be officially released.
In terms of production-readiness, my experience with Dashku has been that the software is pretty stable, and that you have to be bold and try it out; doing so allowed me to discover a shortcoming with relation to the asset configuration, which was resolved shortly after.
I'm using Cucumber to integration test Dashku so a 3rd party can use it internally. In fact, there is an npm module for testing SS apps with Selenium and Cucumber.js called "ss-cucumber".
Now someone tell AOL to go put $11.2m into it ;)