This study describes how adults with type 1 diabetes experience the transition from multiple daily injections (MDI) to continuous subcutaneous insulin infusion (CSII or ‘insulin pump’). The study is based on interviews in focus groups, with 11 persons with type 1 diabetes who had had CSII for at least one year, which were analysed using qualitative content analysis. The analysis resulted in three categories: life and health; involvement of others; and technology dependence. Participants' experiences are summarised in the theme ‘CSII is perceived as liberating, but also implies a sense of the diabetes made visible’. The transition resulted in changed life and health with greater freedom and flexibility, particularly in meal situations. The participants felt that their blood glucose was easier to control. Those around them reacted with curiosity, but some participants felt compelled to tell others that they had diabetes since the pump could be seen or heard. The participants found that coping with CSII in daily life was easier and more comfortable than they had expected. However, having to constantly be prepared for technical failure was experienced as cumbersome. All participants indicated that they were satisfied with their treatment and recommended it to others. Transition to CSII may be experienced as liberating, but might also imply a sense of the diabetes made visible. The results can be used in clinical practice, when advising about CSII. Being aware of both positive and negative experiences with CSII can contribute to better care for those already being treated with CSII.