My son went to Starters for nursery, but a year later, we switched him to KCS local section, wanting him to learn Mandarin. The transition was quite smooth, at least much better than we expected. We were worried that KCS might be a bit too traditional in the way they teach when compared to international schools. But it turned out to be just fine. Quite a number of his friends are native English speaking kids. They all seem to love it. It's a happy school.
My son is now 5, attending K3. He is not the best in class, but he can read and write quite a lot of chinese words. They do have more homework than Starters, but it's not like he couldn't handle it. He loves his school and hasn't complained so far. And he truly believes that his teachers and classmates will miss him terribly even if he miss just one day of class.
I am quite satisfied with their teachers. I find them patient and caring. Anything that I am not satisfied? I think they should have more English class time. You only get 1/2 hour of English for half day school and that's quite insufficient. Also, the facilities aren't that impressive. If they could improve on that, then I have no complain.