Much has been said and written about the control of conventionality, but little reflection has been given to how it operates in practice. Based on her direct experience, the author presents a critical perspective that raises several questions, particularly regarding the practice of both international and constitutional courts, and the specific scope of the control of conventionality within the constitutional justice system—especially the Mexican system—in a complex process of integration. The author's intention is to continue a discussion from both international and constitutional perspectives—aiming to bridge these two sectors—and to discuss specific proposals and cases, whose responses are not always easy or evident, while always striving to address the demands for justice regarding human rights violations.