My elder daughter is studying in a bilingual stream of a local kindergarten. Not very good and I often think of withdrawing my daughter from it. On the other hand, it is cheaper than int'l kindergartens and more importantly, it is under Xiehe group, the same group as SUIS which is my target primary school for my daughter. Hopefully she will be advantageous when entering into SUIS.
For your case, I believe the most important criterion is location - too much time commuting to and fro school may be tough for kids. This website has a comprehensive list of schools for your consideration www.shfamily.com.