I’m currently in my fourth bachelor semester on my way to becoming a Biomedical Engineer. I’ll do my best to elaborate on the different aspects of student life here in Zurich.
First of all, the lectures and classes: especially in the first two years of studies (in the bachelor) you’ll have very little choice about your classes. The goal of these two years is for you to establish a base of theoretical knowledge on which future classes can be built on. Later on, you’ll be more free to choose the subjects you wish attend.
All in all, the quality of classes is high and students are expected to dedicate a lot of their time to studying and lectures.
Student life: going out in Zurich is expensive, that’s why a big part of the nightlife is self-organized by students. Student associations are very active (though that also depends on your field of studies, there’s one per department) and organize a multitude of events.
Living in Zurich: most people can’t afford to get a place of their own in Zurich, prices are very high. So students resort to sharing apartments or living in student dorms.