The service sector is a growing part of the economy in many countries. To be able to survive in this sector, it is necessary to offer the market services that are perceived as having quality. Interviews with both providers and customer stated the importance of cooperation between the two parties. The perspective on cooperation in this article was from the providers' side. The question was, “What characteristics should a customer have?” An aggregation of the different answers to this question by Swedish architects suggested a customer that has good knowledge and relates well with the professional service provider was the best.