This study describes the introduction of an online portfolio in postgraduate medical training in Family Medicine. An online questionnaire collecting quantitative and qualitative data was sent to 90 GP trainees of whom 65 responded. A phenomenological analysis method was applied to the data. The portfolio supported the trainees' ability to monitor their own clinical progress providing a better focus on learning objectives. It was helpful in the organization of the training programme and in the formation of individual personal knowledge. Reflection was stimulated, especially concerning complex and difficult clinical situations and it was used as a point of departure for trainee-trainer discussions. Trainees preferred an online portfolio to pen and paper. The degree of educational support was experienced differently. Obstacles were lack of time, lack of trainer support, inappropriate IT facilities, lack of proper introduction and lack of personal motivation.