Traditionally, the voices of service users have been silent in research into mental health issues. A Norwegian research network, however, recognizes the importance of involving service users as coresearchers and initiated a training program in research methodology and design intended to empower them as active participants in research projects. In this article, we explore how these coresearchers with a mental health service user background experience their participation in projects as well as in attending the training: What is it like being a service user coresearcher in collaborative studies on issues in mental health? How do coresearchers negotiate their roles and mandate?