What are some of the biggest lessons you've learned in building your product?

That your users are always right. But finding your users may not be so simple as talking to the first person you meet. It's REALLY hard to put aside your ego and actually listen to your user's pain points.

The product will not be successful immediately, it will feel both pain and grief. But the result will be as you want if you try. The words seem simple, but there is a lot of meaning.