Seems like a great product! Our inhouse flagging system is painful to use when applying features en-masse, and makes "fast" rollbacks virtually impossible. That, and other reasons, make this seem like a good alternative.

What's the flow like for a developer creating their own environment? I'm a little concerned that asking developers to visit a third party site/be connected to the internet to use feature flags locally be pretty inconvenient, especially if the developer is working offline. Would you consider adding a simple server implementation that could run locally and do feature flagging on a per user basis (rather than rolling out to percentages, to prevent misuse)?