Objective: This article describes the experience of the aval ciudadano "Citizens' Representative" (CR) in improving the Mexican health care system.
Methods: This is a qualitative study which took place in eight Mexican states in 2008. It evaluates different aspects of a nationwide program to increase the quality of health care services (National Crusade for Quality in Health Services). The Mexican strategy is compared with experiences in other Latin American countries.
Results: In this paper, there is the description of achievements and problems encountered by the CR in promoting social participation in the health of the population.
Conclusions: The CR has great influence when representing health service users and passing on their demands for improvements to health care quality.