Hi there: anyone have experience of Zurich International School (ZIS)?

Apart from "what age to join" I was also thinking about extra-curicular languages/culture and how flexible they are to offer/support this.

Would be interested in 'real' experience, in addition to the admissions PR..!

Approximately one gazillion posts answering your question may be found here.

A lot will depend on which campus you are talking about. What age(s) are your children?