This distinction between feedback and reaction is crucial. You want to create a prototype that evokes honest reactions from your customers. You want it to be as real as possible, while sticking to your one-day timeline. As our partner Daniel Burka says, the ideal prototype should be “Goldilocks quality.” If the quality is too low, people won’t believe the prototype is a real product. If the quality is too high, you’ll be working all night and you won’t finish.