For all those for whom CR reporting or sustainability communications are important, the Ethical Corporation has compiled an excellent complimentary analysis. The 5 page report addresses the pro's and con's of the GRI G4 Guidelines. It also offers a thorough overview of other sustainability reporting guidelines (IIRC, SASB etc) which can help you choose the most material and relevant CR disclosure model, in line with your business.
This newly published analysis contains a detailed critique of recent Global Reporting Initiative (GRI) G4 guidelines. In addition to a review of GRI G4 advantages and disadvantages you will also get an understanding how GRI stacks up against other institutions.