This report focuses on the lessons learnt from the responses from donor/agency headquarters and partner countries to the publication and dissemination of the OECD DAC Handbook on Security System Reform (the SSR Handbook) from April 2007 to April 2009. In response to an OECD INCAF Programme of Work and Budget (PWB) objective to report back to members on the dissemination of the SSR Handbook, this report also more broadly considers key issues relating to the impact of the measures advocated in the SSR Handbook.