In this paper, the authors assess how the process and outcomes of research, policy, and service delivery change when they involve or are driven by people who have themselves experienced homelessness. They review the available evaluation literature and present lessons from the field on consumer integration in research, policy, and program implementation. Barriers to consumer integration and strategies for addressing these barriers are described. Barrow and her colleagues further address what happens when people who are homeless make the decisions about the housing and services they need. They conclude by reviewing findings on the individual- and system-level impacts of consumer-driven approaches to homeless assistance.