Summary: excellent budget option for one or two people.
Pluses: friendly and helpful host, flat screen TV with cable and Chromecast (download app and project from your tablet or smart phone), good WIFI, new small refrigerator but with surprising capacity, microwave, bright window in every room, nice park one block away.
Minuses: very small kitchen with small sink (but fully equipped), Hot shower always available but has very low flow, very firm mattress may be a problem for some people, Windows have no view and there is no outside area like a patio or laundry area.
Details: The very friendly host, Sheila (pronounced "Shay-la"), tries her best to make sure that you have everything you need. She lives far from the apartment but can be reached by phone and WhatsApp. Her sister lives in the apartment next door and she and her sons can also be very helpful.
This small apartment on the second floor has five rooms with high ceilings in an older building. The kitchen is tiny with no room for food preparation. Lots of kitchen equipment is stored in the oven, in the dining room, and in the study. You can prepare food on the dining room table. There is a really annoying heavy saloon-style swinging gate between the dining room and the kitchen. There is a microwave oven perched on top of a tall pantry; you pretty much have to stand on a chair to use it -- unless you are exceptionally tall. (But I understand that there's really no other place for it.) Sheila also provides a few extras like paper towels and aluminum foil. The bathroom is fairly large and the shower has its own gas water heater located outside the window. When you turn on the hot water tap (plus the tiniest little bit of the cold water) and wait a few minutes, the water flow becomes very low. There is a bucket there that you can place under the shower and let it fill up before you start washing. As shown in the photos, the front door of the building is sandwiched between a fruit and vegetable store and a small grocery store. OXXO and 7/11 (both open 24 hours) are located nearby. This is a quiet residential area with a little traffic; however, the planes do fly right overhead on their way into the airport. After 10 PM, it is so quiet that you begin to notice smaller noises like the airplanes and the dog barking nearby; both stop during the night. The three nearest metro stations are Lázaro Cárdenas (line 9) 12 minutes away (walk to and from here only during the day), Viaducto (line 2) 17 minutes; Etiopía (line 3) 15 min. A 13 minute walk to the west there is a huge ultramodern shopping centre (Parque Delta -- supermarket Soriana open 24 hours). A seven minute walk to the east there is a traditional indoor market (Mercado Álamos). Two short blocks to the east is the central axis of the city, Lázaro Cárdenas, where electric trolly buses run all the way from the north bus terminal (where you can take a bus to the pyramids) to the south bus terminal (Tasqueña). The trolly bus passes by the Palacio de Bellas Artes (A short walk from the Central Square or Zócalo).