My son is attending their international playgroup.
After 2 months, he has made significant progresses. He "talks" more (actually he babbles), sings more, seemingly very happy to attend class every day. I guess he enjoys school life there very much.
Teacher emails us, tell us what he learns each month (with a theme). Also, send us updates on his progress (sometimes with photos). If my son is absent from class, the teacher or staff will phone me to see what happens.
Also, my son has a clear book showing what he has been taught in school. Like in last month, the theme was school life, and now it's body parts.
Besides, every week or so, he'll bring an art folder in which his artworks are contained back to home, like paintings, drawings, handcraft etc.
My girl is attending PN class, she enjoys it a lot! School-parent communication is good. We got progress report quarterly, send us emails quite frequently on what they learnt at school (with photos!).
Teachers are good too.
We like it very much.
The only concern is it doesn't teach Chinese (only mandarin songs) and if you want your child to attend local primary school then it doesn't suit you.