Great apartment for exploring the Yungay and Brasil neighborhoods of Santiago. It is right across the street from the Santa Ana metro station, so if you have suitcases you won't have far to walk. The building has very good security, with 24 hour concierges in the lobby.
The apartment itself is very comfortable and very clean. It has all the basics you need for a short stay, although if you want coffee in the morning you will have to bring your own instant or go downstairs to the cafe that is next door. The bed is super comfortable and there is a door between the bedroom and the living room. It was nice that the apartment faces an interior courtyard, so you don't hear as much traffic noise from the very busy streets.
The only downside of the apartment is that if it is hot outside, you will need to leave the windows open because there is no air conditioning (there is a fan). This wouldn't be a big problem except that on weekdays, early in the morning (5:00 - 7:00 am) it seems that everyone in the building goes to work. They all drive their cars out of the basement parking structure making a huge amount of noise as the wheels clunk over some kind of metal grate. We found that if you close the window, the noise is greatly diminished, and on weekends, it wasn't really a problem as people sleep in a bit later.