Pls see my post in Shumsuipo's mami club.. I don't think 青衣 is a good choice because of air pollution is more serious there. More fresh air in 清麗苑.. You should visit both 清麗苑 & 翠怡花園 to compare
I live in Tsing Yi Garden 10 years (which near Greenfield Garden) I don't feel air pollution and the traffic is very convenience. More silent and green area.