Nice place, nice location though travelers should be aware that the city center is not super safe after 9PM. But for day time discovery of the city, it's really a nice location. Just take a taxi / uber to get back home.
The appartment is rent through a small company, which was not mentioned in the description. Don't be surprised, the office is in a residential building, it's an apprtment. It can look a bit strange, but don't get scared, people were very nice, easy to communicate with and friendly. Definitely a nice spot, clean and well located to explore bellas artes, lastarrias (2 bohemian / nice though gentrified neighborhoods of Santiago). Enjoy the walks, music in the street, small shops. Santiago is definitely a city worth discoverng in 3-4 days (don't miss the museum of human rights and walk through brazil neighborhoods street arts, and the precolumbian art museum, a jewel).