Nicely located in the "old downtown", near many of the city sites. The apartment itself, although slightly aged relative to its photos (to be expected) feels nicely laid out and spacious. The host and building concierge are nice and responsive.
Light sleepers should note that the bedroom windows struggle to insulate the apartment from outside noises. Additionally, if you are new to the city (as was I) note that Santiago has two city centers, with the more modern one being in Las Condes. Each area has its advantages and are connected by a good subway system.
Bottom line: If you're looking to stay in the old / authentic part of Santiago, this is a very good listing.