We had a very comfortable and quiet stay at Luis's. The front door is manned by a guard 24/7, who are very friendly and helpful, and then you walk through a beautiful courtyard to reach the apartment at the back of the building. The apartment is a bit dark in terms of natural light because it's on the ground floor, but we were out most of the day anyways, so this wasn't a big deal for us and the real pro was that it was extremely quiet for sleeping at night and well located. We were able to walk to the Bosque del Chapultepec, the Anthropology Museum, metro stop, and many restaurants and cafes. Polanco feels like a safe, residential, somewhat more high end neighborhood in general - not quite the density of eateries/going out as Roma Norte but just an easy 13 min Uber ride away from Roma Norte. The water pressure in the shower was a plus! We had trouble turning on some of the stove burners, but the guard promptly provided us with matches and that did the trick. Thanks Luis!