One of the most helpful things I've heard is the "very disappointed" framework that Sean Ellis uses. The idea is that if 20% of some user group would be very di

One of the most helpful things I've heard is the "very disappointed" framework that Sean Ellis uses. The idea is that if 20% of some user group would be very disappointed if they couldn't use your service any more, then you've nailed it. I disagree. The biggest flaw with that survey is that it doesn't include pricing. Just because someone says they'd be "very disappointed" if your product disappeared does NOT allow you to conclude that they'd be willing to pay for it, let alone at a profitable price point.