What I know 上書房 does not have the N class (for 2 years old), but I heard it is a good kindergarten.
Well, I only applied for 聖道明 and 迦南 last year but my daughter only attended the interview in 聖道明 which accepted her for PM class, because the interview schedule in 迦南 was in the same time with other school which I prefer more. As for 啟思, they only accept application for Big Baby (for N class) so I did not apply.
Anyway, my daughter will attend another kindergarten for N class but not those schools as mentioned above.