On the basis of a large-scale online survey, we examined the self-reported effects of and satisfaction with international student mobility among Polish tertiary education students who took part in such mobility 5-6 years before the survey. They emphasised the following benefits: improving their foreign language skills, making international friends, enhancing their intercultural understanding, becoming more mobile, independent, self-confident, and feeling more European (an identity effect). More than 2/3 of our respondents indicated the highest possible level of general satisfaction with their international student mobility and more than 90% of the study subjects did not hesitate to recommend such an experience to their friends. Therefore, promoting the participation of university students in study periods abroad seems both an attractive and a valuable educational technology, at least from the Polish perspective.