Overall, it was a great apartment. It was clean and nicely designed with a nice, if impractical, small balcony with a bit of mountain view. The kitchen has every you need to cook a bit, and, most importantly, not a crummy electric stove, but a gas one. It is located in Providencia - a very central area in Santiago.
The only minor downsides were the construction site right next to it which starts working at 8 am and is pretty noisy, and the sofa that was not very comfortable (although that goes for all the Airbnbs we've been to so far in Santiago).