Mental health clinicians were trained to master interventions and to become trainers for promotion of development and prevention of mental health problems in children with mentally ill parents, as part of the Effective Family Programme. The trainees’ experiences of the impact of the training on their professional skills and work satisfaction, on one hand, and implementation of the methods, on the other, were examined. The data was collected by a questionnaire. The 30 respondents (response rate 83%) reported an increase in their professional skills as well as in work-related joy and motivation. Most of them had trained others, and implementation of the new working methods had started. The success factors of the Effective Family training for first phase of the implementation are discussed.