I had a pleasure to stay here for 10 days on my visit of CDMX. Ernesto has very timely communication and gave me a tour of the apartment upon arrival. As promised, for a stay of over a week there is one cleaning scheduled and it left the place spotless. The location is very good, close walking distance to lots of restaurants (make sure to stop by Taquería Selene a few blocks over), within 10-15 min walk to Chapultepec park and its multiple museums, and also Reforma. It's 10-15 min to get to the nearest Metro (I used Sevilla).
The kitchen has plenty of dishes for your needs, a little stove, coffee maker, microwave, full fridge. The bed was quite comfortable. There is a little strongbox for your valuables. Shower has good water pressure and running-water heater, gets hot within 10s from opening, though if you try to add a little bit of cold water the heater might turn off and make the whoel shower cold. Some of the lights in the apartment are based on motion sensors that can be a bit finicky. Sometimes the light would turn off while I'm in the bathroom, or when I was trying to work on a computer in the kitchen after sunset. There is a passive wall heater that works quite well to get you through the cold winter nights.
Overall, a very nice studio to stay for a few days or a few weeks in CDMX.