Tiglin provides addiction treatment through long-term residential and aftercare programmes grounded in a Christian ethos, focusing on the biological, psychological, social, and spiritual wellbeing of individuals. From 2019 to 2023, Tiglin conducted a comprehensive evaluation of its group programmes across the Men’s, Women’s, and Aftercare centres. It assessed service user satisfaction and programme effectiveness through quantitative and qualitative methodologies. A total of 2,375 evaluations were collected across 289 groups, providing valuable insights into service user satisfaction rates. The evaluation finds that service users’ experiences of Tiglin’s group programmes in the Women’s, Men’s and Aftercare Centres highlight the value of and need for these treatment programmes.