This survey by the Kaiser Family Foundation of Navigators and other Marketplace consumer assistance programs under the Affordable Care Act (Obamacare) offers a nationwide analysis of the number and distribution of assisters and people they helped. The report examines the experience of programs in conducting outreach and enrollment assistance during the first open enrollment period. It also reviews the nature of help consumers needed applying for Medicaid or premium tax credits and understanding health insurance choices, and discusses key factors that impacted the effectiveness of Marketplace Assister Programs.