Cintia's apartment is cozy and well equipped for a week in CDMX. The building is located in a busy but uninteresting part of the city center, a 10 minute walk from two different subway lines that will quickly take you to more walkable and interesting parts of the city. There isn't much to see or explore within walking distance, other than a large shopping mall with a Walmart and clothing/electronic stores. Mexico City's largest marketplace, La Merced, is also reachable in 20 minutes by foot and shouldn't be missed. There I ate the single best taco I've ever had in my life at the food court in the market's main hall - the stall is called "Cinco Hermanos" - see if you can track it down if you're up for an adventure.
When going out at night, Ubers got us from the apartment into Roma Norte in 10-15 minutes, traffic pending. The apartment's adjacent neighborhood, Doctores, is not the most desirable place to be walking around after dark, especially as a gringo, so make sure you're taking a taxi or Uber when venturing out into the night. We walked through Doctores a few times during the day with no issues, and found it to be a colorful and interesting neighborhood that will probably start to gentrify soon.
The apartment's balcony is really nice to sit on and watch the sunset and listen to the buzz of the city below, and the flat is equipped with a nice sound system that was great for playing Bluetooth music on. The bed is extremely comfortable.
All in all a good value for the price and a great base for exploring this crazy city. Would definitely return again.