Great location in the historic center. Supermarket next door with an ATM and a good express checkout line for up to 15 items. Sushi restaurant across the street and to the right on Merced (past the tiny side street, and in the direction of decreasing street numbers) has GREAT shrimp ceviche, get that instead of their cream cheese laced sushi.
Dominic was super friendly and super responsive. The place was spotlessly clean.
Location: major tourists sites are within walking distance. Great restaurants, too. Be careful walking around late at night, particularly on Sunday when very few people are out; the neighborhood can be a bit sketchy. But if you are going to stay in the center (and it is wonderful during the day) this is a VERY SECURE building. Key card entry system, 24/7 guards at both entrances, etc. I did see an attempted phone snatch by a bicycle riding thief at 11:30 p.m. Sunday. That could happen anywhere but in fact it did happen on this building's block.
Pool: I loved it and swam every day I could but others will find it cold. 17 degrees C, 64 F. (It is unheated). Pool is closed Monday and Thursday for cleaning. Open in Chilean summer only. Crowded on Saturday, fine all other days it was open.
There is no A/C in the apartment but it is a well designed building in terns of sun orientation and wall thickness. And there is a strong fan in the bedroom; I was never uncomfortable in a week of 27 to 30 degree C (80 to 86 F) weather.