Good products respond to consumer demands. Great products respond to consumer needs. The problem with consumer needs is that they generally can’t be revealed in quick and easy focus groups and surveys (these tend to reveal demands).Humans are usually unconscious of their own needs, because we tend to cope, and in coping forget that we have unmet needs. Revealing needs requires ethnographic research. The use of ethnographic research in product design is increasingly popular (see this article). Needfinding, as taught at Stanford, has equipped me to carry out such research to uncover consumer needs.