If you are even contemplating about booking this place, don't think or compare any further, just book it. My family is an Airbnb host and we have stayed at Airbnb in a few continents; based on our experience, this place is perfect!
Christoff was so easy to communicate with and very prompt. We texted him while arriving at the airport and then met him at the apartment late at night. He even welcomed us with a bottle of wine. To accommodate our unusual checkout time, we were able to leave the key in the apartment and catch Uber to the airport (only 17 min at 3 am).
The apartment is exactly the way it is described on the profile: bright, airy, clean, and modern. If I wanted a pad in Santiago, this would be the ideal place. Both rooms have double beds, one is larger than the other. There's even a small third den with a projector to watch movies.
The location was amazing, literally across the best wine bar in town, called Bocanariz, and several excellent cafes few steps away. On Sunday, there's a small open market just up the street where locals sell arts and crafts. You can walk to all the sites in about 15 min or less: Plaza de Armas, the Art Museums, Patio Bellavista, and La Chascona.
Note: Santiago doesn't seem to have central heating, even in public buildings like the national museums. So if you are staying during the winter months (we came on the first week of June), the portable heater is available in the bedrooms but you also need to wear an extra layer. My family did sleep comfortably with the heater provided. Christoff delivered extra new comforter in case we were cold. His hosting and accommodation are superb. Highly recommended!