Very easy for our team members in different time zones/locations (US, Europe) to work together seamlessly without having to be physically present with one another! Also great that its open source - if you have an idea or need of something new it's super simple to customize through their community-based approach.
Nothing at this point but happy we found them as they are creating some really cool things around how teams collaborate remotely while keeping everyone informed about progress. We use Blitz primarily because it integrates well into Slack which allows us all to communicate via text chat instead of emailing back & forth.