It looks like a promising project management kanban tool - similar to Trello, but integrated to GitHub.
|Release time frame|
As mentioned in the comments, the current GitHub issues integration is a comprehensive integration and can work with Zenhub. With the addition of epics to Zenhub, the following workflow will work using the existing Github issues integration:
At this point, based on current priorities and community feedback, we are unlikely to make additional updates specific to Zenhub, but we would love to hear additional feedback about how this works or potential improvements that would be helpful in the comments below.