AbstractAims: Patient-reported outcomes have become an important source of information to guide service provision. Although opiate substitution treatment (OST) is an evidence-based and widely available intervention for opiate dependent individuals, evaluation studies have primarily focused on objective outcome indicators rather than on clients’ perspectives and personal experiences. This study aims to assess opiate users’ satisfaction with various aspects of substitution treatment and their subjective experiences and expectations regarding the provision of psychosocial support. Methods: The study sample consisted of 77 opiate-dependent individuals who had been involved in OST for at least three months in some cities in Belgium. Qualitative interviews were used to explore clients’ subjective experiences, in addition to some quantitative measures. Findings: About half of the respondents recently received some form of psychosocial support and they were generally satisfied about these services. However, the n...