Great location for visiting Santiago. Basic but nice apartment on the 11th floor of a tall residential building with 24-hour security (where we picked up the keys for check-in). We stayed Thursday and Friday nights and there was lots of nightlife noise until sunrise. We were mostly able to sleep through it, but wouldn't recommend for light sleepers. Good fast WiFi. Strong, cold air conditioning, and there is a pedestal fan, too. Washer/dryer are elsewhere in the building, not in the apartment itself. Only minor complaint is that the cookware was not in very good condition and the dishes could have been left cleaner.
Note that as of January 2020, the nearest metro station remains closed following the October 2019 protests. This area felt great and safe except on Friday after dark when some of the protest and police conflict spilled into the neighborhood, including the streets immediately around the apartment. On a Friday, I would plan to be back in the apartment before 10:30 p.m. Otherwise, Santiago is great to visit right now and we highly recommend it!