Used to come here way too much when I started university. The crowd is definitely mostly that age, barely legal people who haven't found their true scene yet.
Upstairs is more bar, tables and a few games. Downstairs is club area, overpacked on weekends and insanely hot in the summer. In between you have the heated terrasse, a very cute touch. No matter which floor you're on, it'll take a while until you can place an order and the drinks are not very strong so sticking to the cheap shots is best.
The music downstairs is pretty bad to be honest, same old "remix" of all songs so you have to drink enough to forget you're dancing to the same beat over and over again. Upstairs it's a bit better, mostly oldies and hip hop. There is a cover charge most nights and the bouncers aren't super friendly.