Since the CSF method was first proposed by John Rockart in 1979, the method has been adopted for numerous research studies in Information Systems (IS). Like many research methods, the CSF method has both its supporters and critics. Almost thirty years on, this paper provides a comprehensive review of the original CSF method and of subsequent adaptations. The primary contributions and criticisms of the method are synthesized. The paper then discusses insights gained from the application of an adaptation of the CSF method in a large study involving six multi-national IT services organisations, thereby providing guidance to researchers who may consider using the method in future research.