"Astrology Critics", reviewing Addey's "Harmonics in Astrology" (1976), writes that the book starts from the fact that even basic issues such as "which is the best system (Eastern or Western) in astrology, what is the correct house system, where is the cusp of a house, the delineations in 'good' and 'bad' aspects or 'good" and 'bad' signs." The review suggests that harmonics could throw a new light on such questions, but concludes that "what John Addey wrote is only the seed. The theory of harmonics in astrology needs more research and development in order to see how can be better applied in practice. Unfortunately it didn't made much progress since 1976".