Exciting findings after 30+years! The original planning and design principles have shown desirable results over the time. Early site and service projects in Latin America has now become vibrant communities, too. Incremental housing, as its name indicates, takes time to mature. I am now working in China. The Chinese government has ambitious goal of upgrading all the substandard urban housing by 2020. The promising site and service model has not been applied in cities in China. The model poses challenges in such context: 1) land in cities cannot be owned by individuals; 2) the project may not become a nice neighborhood within 5 years of a mayor's term; and 3) no one wants to see a matrix of toilets.