For some decades now the Rebound Effect divides the energy and resource communities. Views range from a virtual negation of the effect to the opinion that it 'eats up' most of the efficiency gains. In our seminar we will first provide a short overview of the experiences in the Parliamentary Commission (Enquete-Kommission) of the last Bundestag on "Growth, Prosperity and Quality of Life" who delivered a consensus view of the rebound effect across all political Parties by one of its former members, Hermann Ott. Afterwards, Tilman Santarius will present the findings and insights of his PhD research into the effect and finally, Julika Weiß will present the results of a study on the rebound effects in the energetical retrofitting of buildings. A hopefully lively discussion will ensue and shed some light on the theoretical, conceptual and practical experiences of participants.