This study, commissioned by the European Parliament’s Policy Department for Citizens' Rights and Constitutional Affairs at the request of the LIBE Committee, analyses the proposal for a Regulation establishing the EPPO. The evolution of the text is analysed through a comparison between the initial Commission proposal and the current version of the text (dated of 28 October 2016). The paper assesses whether the EPPO, as it is currently envisaged, would fit the objectives assigned to it, whether it will have some added value, and whether it will be able to function efficiently and in full respect of fundamental rights. It focuses on the main issues at stake and controversial points of discussion, namely the EPPO institutional design, some material issues, its procedural framework, and its relations with its partners.