A questionnaire to GP-trainees concerning the assessment of an online portfolio showed that the portfolio provided focus on learning objectives and strengthened the capacity to monitor progress in competence and organisation of practical training. It stimulated knowledge consolidation and reflection in complex clinical situations. The portfolio notes furthermore provided a good starting point for trainer-trainee discussions. However, the value of the portfolio was experienced heterogeneously. Constraining factors were: lack of time and interest from the trainer, inadequate IT-facilities, missing introduction and lack of personal motivation.