I had applied 合一堂 's nursery for my son last year, and I have got some unpleasent experience. I think the campus is not big enough for the kids to 'run around', and they are not prefer their students to play in outdoor. Besides, the campus has different floors and the child may have to climb up the stairs. I think it's a little bit dangerous, if there are some kid are pushing each others.
I had heard that the reputation of 馬鞍山靈糧堂 is quite good, and some of the child can sucessfully applied some famous primary school in Kowloon Tong. However, I haven't visited the campus and I don't know about the physical environment.