This report aims at developing a methodology that allows to compare different Privacy Enhancing Tech-nologies (PETs) with regard to their maturity, i.e., their technology readiness and their quality concerning the provided privacy notion. The report firstly sketches a methodology for gathering expert opinions and measurable indicators as evidence for a two dimensional rating scale. Secondly, this report reviews two pilots to test the proposed scales and methodology. The results of these pilots are presented in this study. Finally, a list of necessary steps towards a PET maturity repository is made available.