Family members of seriously mentally ill persons were interviewed to determine their satisfaction with services received through a countywide service system based on the community support program (CSP) model developed by the National Institute of Mental Health. Interviews with 56 family members indicated that a majority were dissatisfied with various aspects of the service system. Multiple regression analysis revealed that significant contributors to family satisfaction were sex of respondent, type of relationship to family member, age at onset of illness, and time since onset of illness. Interaction with a case manager, specifically interaction involving emotional support for families, was the strongest factor explaining family satisfaction. That finding confirms the central role of the case manager in the delivery of CSP services.