What's the best managed community you've ever seen?

After the cancellation of the property, the residential environment is not as good as before, and most of the public land is occupied by private individuals. This is just a superficial phenomenon without property management. What is even more frightening is that the facilities and equipment in the community, such as elevator system, fire fighting system, monitoring system, water supply and drainage system, public lighting system, etc., are not routinely maintained and regularly overhauled, and these equipment will age early and have various failures. This will not only affect the owner's life and travel, but also bring serious security risks.