Sean Ellis offers this view: ‘achieving Product-Market fit requires at least 40% of users saying they would be “very disappointed” without your product. Admittedly this threshold is a bit arbitrary, but I defined it after comparing results across nearly 100 startups. Those that struggle for traction are always under 40%, while most that gain strong traction exceed 40%’.

(Excerpt from The Entrepreneur's Guide To Customer Development)

Learn to make heroes for your startup by buying a copy now