Nice stay in Santiago!
Patricio was very communicative prior making sure we could find the place easy and made sure we understood everything about the apartment and the amenities.
The apartment itself is clean and spacious, with 2 bedrooms that are comfortable and well appointed. Great views of the mountains and the castle from the terrace!
The location is central with plenty of cafes, bars, restaurants, and shops within walking distance. It is also a short walk from the art museums, historical sites and the central market.
Note: as the apartment is right in the middle of the city center, there is a lot of traffic (car and foot) outside, so be prepared to navigate crowds. Also for some street noise- mainly traffic or music- that can be heard in the bedrooms. The main room (living space and kitchen) is quiet, as it is on the other side. We stayed in winter, so it did get a little cold, because of where the apartment is situated, but there is a powerful space heater.
It was nice having laundry facilities on premises (on 2nd floor of building), but it is fairly expensive. My one complaint is the shower - it is poky and uncomfortable, and the water can be very hot and very hard.
If you're looking for a safe, roomy place to stay in the historic center, I would recommend Patricio's place. Patricio was a thoughtful host.