What’s the best way to know if you have product market fit?

Mariya Yao (Founder at Xanadu)
Lessons Learned: Rapid Iteration for Mobile App Design

the question Sean Ellis popularized, where you ask your users, “How disappointed would you be if you could no longer use our product?” and have them answer with either, “Very Disappointed,” “Somewhat Disappointed,” “Not Disappointed,” or “I no longer use the product. ” Sean did research across hundreds of startups and discovered that companies that had fewer than 40% of their users answer “Very Disappointed” tended to struggle with building a suc… (read more)