A new scheme called ?Reducing Emissions from Deforestation and Forest Degradation in Developing Countries plus Conservation, Sustainable Management of Forests, and Enhancement of Forest Carbon Stocks? (REDD+) is being discussed to be one of the essential elements of the post-2012 global climate change regime. Many countries have put their proposal on the architectures of such scheme to the UNFCCC and demonstrated pilot projects on the ground as well. The research has been conducted to analyze critically the extent to which the REDD+ architecture being designed in Indonesia would be able to deliver climate effectiveness, costs efficient, equity outcomes and social and environmental co-benefits (3E+). It is argued that the basic idea of REDD+ is very simple to incentivize emission-reduction activities from forestry sectors in developing countries. However, so far, the REDD+ architecture appears to contain several contentious issues. Therefore, the issues should be addressed seriously otherwise they would undermine the REDD+ objectives.