Postsecondary education is widely seen as a necessity in the modern economy, yet among low and middle-income families, college enrollment rates are dismayingly low -- and graduation rates are even lower. College Promise programs, which cover local students' college tuition and fees, are one strategy states and municipalities use to help. But traditionally, these programs look only to expand college access, not to address college success. Detroit's Promise program was designed to encourage college attendance among some of the nation's most underserved students, those in Detroit, Michigan. The next step was to help students succeed once they enrolled in college. To do so, MDRC and the Detroit Promise partnered to create the Detroit Promise Path, an evidence-based student services program. This report presents findings from MDRC's randomized controlled trial evaluation of the Detroit Promise Path. About two-thirds of eligible students were randomly assigned to be offered the new program, while the rest were assigned to a control group who receives the Promise scholarship alone, and thus does not meet with coaches or receive incentives. Comparing the two groups' outcomes over time provides a reliable estimate of the effects of the Detroit Promise Path. The findings in this report include the following: (1) The program has a positive effect on students' persistence in school, full-time enrollment, and credit accumulation; (2) Although it is too early to reach a conclusion about effects in the second year of the study, the early findings are encouraging; and (3) Participation rates were high among enrolled students, and students reported positive experiences in the program, especially in their relationships with their coaches. It is clear that Detroit Promise Path is having a positive effect on students in the first two years. This evaluation shows that building student support services into Promise scholarships can have a meaningful effect on students' academic progress. [Additional funding for this report was provided by the Michigan Education Excellence foundation.]