I stayed at Martha's place for 6 nights. Martha was easily communicative and fast to reach during my whole stay there. She waited up till midnight to check me in and showed me her place, which was accurately described on this website.
The apartment was clean and comfortable to stay. I was there during an earthquake (7.2) and I was quite surprised that the whole place (after the earthquake) looked like nothing has happened, everything was just fine and I felt safe during my stay there.
Apartment is very close to local grocery store and a mall. The neighborhood felt very safe and lots of good restaurants within a walking distance.
Subway station is nearby too, which took me me all over the city and beyond.
Thank you Martha for all the special touches, for checking on me frequently, bringing me city maps and calling a taxi for me.
Definitely recommend this place to everyone who is looking to stay in Mexico City!