Maria's place is spacious for one or a couple with separate rooms for the bedroom, kitchen/dining, bathroom and walk-in closet. The water flow from the shower is plentiful, but you may need to adjust the temperature as you go. The bed is king-size and comfortable. Wifi is 50Mb/s downstream, 20Mb/s upstream and was reliable. Maria and her husband were very responsive to a couple of minor issues that I had. The place itself was clean and comfortable. As it's on the Reforma, you can hear traffic during the day and the occasional trucks and sirens at night, but that's city living for you.
The apartment is located in the back of the building with some light from the courtyard, but not much of a view. It can get a little dark inside but you have the Reforma at your doorstep and the restaurants all around the area. The building itself is one of the older buildings with a grand facade, but the interior could use a little refurbishment (although this isn't really the host's responsibility). There is a shared laundry room on the ground floor where the conference/meeting area is. In the laundry room, there is a new-ish washer (free) with a large capacity and a token-operated dryer (2 tokens for 25 pesos which can be purchased from reception). The rubbish can be deposited in the rubbish bin behind the sliding glass door just at the bottom of the stairs on the ground floor.
As noted earlier, the area has numerous restaurants to indulge in as well as street food stalls on some of the side streets. Multiple convenience stores are minutes away by foot while the closest supermarket is about a 15 minute walk. You can walk west along the Reforma and hit the Bosque del Chapultepec or go the other direction and hit centro and all the landmarks and attractions there. You can walk south and explore the neighbourhoods of Roma Norte, Roma, Condesa and Hippodrome. So, it's well located for those who are new to Mexico City.