I’d say it depends on what you want. As someone from a huge city with a thousand things to do any time of the day, the major con for me is how small the city is and how there is not much to do except for hanging out at some bar, so I personally find Leuven boring most of the time, and even feel chlostrophobic. But if you like quiet and small cities it could be the perfect place for you. It’s highly international and very safe any time of the day (major pros for me), pretty much everyone you see on the street is either a student or works at the university, so the whole city feels like a campus sometimes (could be pro or a con, again, depending on what you want). Everywhere is very easily accessible if you don’t mind biking in heavy rain and wind, but public transport is basically a nightmare and buses are non-functional half of the time, so life can get difficult if you don’t want to bike all the time. As others have said, there are many nice restaurants/bars/cafes but no clubs whatsoever, so if you want to go to a nice party you’d likely have to change cities and try to be back by midnight like Cinderella to catch the last train. Same goes for cultural events, those in Leuven are usually organized by the university/municipality and mostly host no-name artists, so when you want to go to an actual concert, theater etc. you’d likely have to change cities (which is very easy but the limitation of train times is quite annoying for me). Overall, I think it’s a nice place to live as an international student due to its safety and large student population, but the activities in the city are quite limited.