My friend's kid is studying in 啟思. As told, his son is very happy with his school.
Another friend said that the kids of 啟思 might not be able to catch up with other local schools because 啟思 is somehow between local school and international school. Unfortunately, 啟思 teaches all subjects in Chinese except for English (and Bible?). The English standard is not higher than other local schools and the kids are more free in schools. The teachers will not push them.
So, parents have to think what education style should most fit their kids and their future study.
(My friend is neither a civic servant nor a teacher.)