Your happiest, biggest customers are satisfied because your product already works for them. The most valuable insights for innovation and growth come from understanding your non-customers—the people not buying from you. Their unmet needs represent your largest untapped opportunities.

Before changing the product, redefine your target market to focus only on the user segments that already love what you've built. By simply segmenting their data to exclude misaligned personas, Superhuman's PMF score jumped 10% without writing any code.

Early customer feedback will be polarized, and this is normal. The key is to compare the 'hell yes' customers with the 'not unhappy' ones. Meaning emerges from this contrast, revealing the subtle differences that drive true product love and guide your roadmap.

Product-market fit isn't just growth; it's an extreme market pull where customers buy your product despite its imperfections. The ultimate signal is when deals close quickly and repeatedly, with users happily ignoring missing features because the core value proposition is so urgent and compelling.

Initially, customers often "round down," focusing on missing features. A key sign of product-market fit is when they start "rounding up"—their faces light up in demos, and they imagine the product's future potential, forgiving current limitations because they believe in the core value.

Don't treat all "somewhat disappointed" users equally. Superhuman only acts on feedback from the subset who still identify the core benefits loved by fanatics. This ensures roadmap items will resonate deeply and successfully convert them into advocates.

Hux's founder measures success not just by retention, but by the passion of retained users. When users start writing in daily, angrily demanding bug fixes, it's a strong positive signal. It means the product has become so essential to their routine that they care deeply about its improvement.

Raw customer feedback is noise. To make it actionable for Product, organize it along two dimensions: impact and frequency. This simple framework separates signal from noise, distinguishing high-priority, high-impact issues from niche requests and creating a clear basis for roadmap decisions.

Eve discovered the true product-market fit for their old product only when they announced its shutdown. The most passionate customers protested vehemently, revealing the product's actual value and core user base, a high-stakes but effective test.