Mexico City is my home town, so I can be somewhat picky about where I stay.
Caroline's place is really well located, close to grocery shopping and across the street from a mall with some really good restaurants. It's also located in one of my favorite parts of Mexico City, which is safe. It's a bustling community within the city, full of shops and restaurants of all kinds. It's generally within a 20-minute cab/Uber ride to most major attractions or places where you might have business meetings.
Caroline and Virginia are great, welcoming hostesses. Their home is well-appointed and very comfortable. My room was spacious (2nd stay) with a very comfortable queen bed, a desk and comfortable chair and tons of interesting books to read in I think at least three languages. There is plenty of closet space. The bathroom is a good size and the shower excellent with good lighting.
The WiFi is excellent and there is some view of the city. The kitchen amenities are just what one needs for a short or a long stay. Separate dishes, flatware and a fridge for AirBnb guests which works out fine.
Entry to the building is secure, day or night and everyone I have encountered there have been warm and gracious. I highly recommend Caroline's place for any age traveller.