Playgroups in Hong Kong

Hey, I am thinking of putting my 1 yrs old son into a playgroup and wondering if you guys have any advices on the following schools.
1) Shichida-shiki
2) SPRING
3) KinderU
4) Full brain development

I am interested in the brain training program and any opinion/idea would be appreciated!

If you're already in HK, you'll be better posting on the FB groups for parents and, in particular, about schools.

I'm not familiar with the last one you mention, but PG is about language choice, personal preference and connections to kindergartens.