Good place, very private. Short walk to restaurants and shopping and trains/buses.
There was a bit of an ant problem in kitchen bathroom and Livingroom from day one but were not present in the bedroom at all so it was not a big issue to me and I did not voice the concern to the owner as I had a room where I felt confident they were non-existent.
The apartment is bigger but doesn't have the balcony like the other 3 in the building have. I would stay again if visiting Chile but I think I would switch rooms and sacrifice the size in order to have the balcony.