Germany’s first official review of its cannabis legalization law finds major reductions in cannabis-related crime, no significant surge in adult use, and continued declines in youth consumption. The interim report, prepared by the EKOCAN research alliance, evaluates the Konsumcannabisgesetz (KCanG), which took effect April 1, 2024. According to the report, cannabis-related offenses recorded by police have fallen by 60 to 80% since legalization, marking the most substantial decriminalization in modern German history. Survey data and wastewater monitoring in eleven cities reveal that adult consumption trends have remained largely unchanged, continuing a gradual increase observed since 2011. Among youth, cannabis use has actually been declining since 2019, a trend that appears unaffected by legalization.