It is a nice apartment for a couple traveling around Santiago. It is very close to a metro station so it is easy to commute. Sky Costanera is 15min max walking, which is super OK since the neighborhood is safe.
We stayed in the apartment in late January; it was hot but we didn't use the air-conditioner (during the night the temperature was cooler). The bathroom had a bit of mold; the curtains of the bedroom/living room were also a bit dirty.
I think the kitchen could use a bit more appliances. For example, we didn't find wine glasses.
Overall a good place and Paola was friendly, always quickly replying to our questions.