Reference to your response, the SIS went through a bad patch last year due to the Head, but a new Head in place things seem to be getting better. I am familiar with the staff and can say that they are very nice and have the childrens best interests at heart. The geographical area of the school is not the best (rough end of Basel, lots of strange people hanging out!) As your children are quite young then this should not be an issue as you will be collecting and picking up. There are rumblings of lack of funds but you will have to make your own mind up. Travelling by car is easy and the tram network is excellent - so I would not give up on the idea of the ISB. For the same money you get a lot more!