Early Head Start services are typically offered through home- or center-based delivery models. A formative evaluation of an example of each service delivery model was conducted. The purpose was to examine the issues involved in the implementation of these two service delivery models relative to the content of services, intensity of services, opportunities for family involvement, and efficiency of program management. Findings suggest that the two delivery models differ in content and intensity of services. Both models faced challenges in program implementation and management and both struggled with family involvement and engagement. Implications for future research are discussed. (Contains 1 table.)