The process and outcome of psychoanalytic psychotherapy have been studied for a long time. However, the experiences of patients, particularly in therapies where goals were not met, have not yet been the target of extensive research. Psychoanalytic psychotherapy with young adults might face particular challenges. The overall aim of this thesis was to explore the experiences of young adults in psychoanalytic psychotherapy, with a particular focus on differences between suboptimal therapies and therapies with generally good outcome. The setting was naturalistic, and perspectives of the patient, therapist and observer were combined. Qualitative and quantitative methods were used. Study I explored experiences of psychotherapy process and outcome among seven patients in psychoanalytic psychotherapy, who expressed dissatisfaction. Interviews at termination and 18 months later were analysed using grounded theory and compared to therapist experiences. Patients experienced abandonment with their problems in and after therapy, since therapy according to the patients lacked connections to daily life, as well as flexibility, activity and understanding from the therapist. Therapists presented a different picture of the same therapies, mainly focused on the difficulties of the patients. Study II analysed the experiences of 20 non-improved or deteriorated young adult psychotherapy patients at termination of therapy and 36 months later. Non-improvement and deterioration were calculated based on the reliable change index on self-rating scores. The grounded theory analysis of interviews established spinning one’s wheels as a core category. The relationship to the therapist was described as artificial, although at times helpful. Participants experienced their own activity in life and active components of therapy as helpful, but thought focus in therapy was too much on past experiences. Study III explored the experiences of 17 young adult patients, in psychoanalytic individual or group therapy, overcoming depression. The analysis of interviews from therapy termination and 18 months later indicated that finding an identity and a place in life were perceived as intertwined with symptom relief. Negative experiences included difficulties to change oneself, fear of change, and problems in therapy, such as too little activity on the therapist’s part. The results were discussed in relation to young adulthood, therapeutic alliance, mentalization, and attachment. The conclusion was expressed in a comprehensive process model of suboptimal therapy with young adults, with suggested ways to prevent such a development. The therapist’s meta-communication and correct assessment of the patient’s mentalization capacity from moment to moment are proposed as crucial. Regarding clinical implications, therapists of young adult patients need to establish meta-communication on therapy progress, as even experienced therapists might be unaware of dissatisfaction or deterioration. Meta-communication could be considered part of the treatment itself, as it may foster mentalization and good outcome. Further, the period of young adulthood entails decisions and developing an adult life, and therapists need to make room for this by active interventions.