The world's biggest Employment Guarantee Programme, India?s National Rural Employment Guarantee Scheme (NREGS) has been in operation in rural India since February 2006. In principle, the scheme is a self-targeted programme designed to provide 100 days of employment to rural households and to serve as a safety net. More broadly its aim is to reduce rural poverty through the creation of sustainable rural infrastructure which is expected to foster rural economic growth. This study looks at the performance of the NREGS from three perspectives - it examines the targeting aspect of the programme, the efficiency of the implementing PRI bodies and the impact of the program on various outcomes at household level. The study is based on primary data collected from 500 randomly selected households, 2249 individuals and 70 schemes located in 13 Gram Panchayats in Birbhum District of West Bengal, India. On the basis of this primary data, the study reveals that at least in Birbhum District the programme is far more likely to be accessed by poorer households (defined in terms of land holding, monthly per-capita income and other household related characteristics). At the same time there is a clear and substantial impact of left political inclination in terms of enabling access to a greater number of days of work under the scheme. In terms of the efficiency impact, the analysis reveals a clear violation of the formal clauses and the spirit of the NREG Act and thereby undermining the potential of the programme in terms of providing a safety net. In terms of the impact, the study finds no statistically significant impact on economic outcomes at household level but does find a statistically significant and substantial relation between reduction of stress related to joblessness and access to the NREGS. The estimates suggest that while the NREGS may not be creating any new employment, and may indeed be substituting for existing employment opportunities, the scheme is still considered valuable as it offers better working conditions.