The study presents an evaluation of the SI-program at five LTH engineering educations based on data from inquiries to SI-participants and SI-leaders, data on credits taken by the students during the first year, and average grade data from high-school for the first year-students. The results show that participation in SI-sessions markedly improves the chances of student success in studies during the first year. Furthermore, there are clear indications of a positive social introduction to engineering studies that is created through the SI-program. The SI-sessions also improve the participants study techniques and develop common skills important for the engineer, like problem solving, working in a group, and presenting/discussing results.