Juan Pablo and Taina graciously met us outside the apartment to give us the keys and show us how to use the locks despite heavy rain. They were great hosts overall, helping us buy museum tickets ahead of time, lending us an umbrella, and checking in. The location is definitely the selling point for this apartment. We were able to walk to various neighborhoods (Condesa, Roma, Juarez) for coffee and meals, Chapultepec Park for the attractions, and convenience stores. There was even a neighborhood taco stand we loved.
The apartment is a smidge smaller than it appears in the photos, but it was fine for 2 people. As mentioned in other reviews, the bathroom is very tight. If you are not comfortable with an external staircase or windows that open to concrete space or wake easily with noise, this is probably not the place with you, but it worked for our purposes.