Ana’s apartment is in a wonderful neighborhood, Escandon. It is a very short and easy two block walk from the Patriotismo metro station. It is also very close to La Condesa, a more upscale area with lots of bars and extranjeros, but Escandon itself is a more authentic place with great local restaurants (with Mexican food, rather than catering to an international crowd), a Saturday and a Tuesday tiangui (market), and, most importantly, an amazing coffee shop, Cafe Rosa, in the same block as Ana’s apartment, that serves the best mochas (the owner hand-grates Oaxacan chocolate into the mocha).
The apartment itself was very clean, with all the amenities you could want —2 bathrooms with showers, two bedrooms, a kitchen with all the supplies we needed to do our own cooking (including oil, spices, etc.). It is very secure (3 locks on the door), and a very friendly doorman. There is a laundromat next store and he will check on your clothes for you if you get back too late in the day after the laundromat closes. The only downside of the apartment is that it is noisy. Some neighbors play music until late at night, and one bedroom adjoins an apartment that keeps the door to its patio open, and the family that lives there watches tv and talks until about midnight each night.
Ana herself was fabulous. The friend I was traveling with and I speak fairly good Spanish, but Ana communicated with us in flawless English. She was waiting for us when we arrived. She gave lots of very good recommendations of things to do in CDMX and Escandon, and left a guide from a newspaper of stuff that was happening in the city that week for us to use. She also had water, chips, and beer for us. We had two questions while we were there, and she answered both right away.
All in all, our week in CDMX was fabulous and we would definitely advise staying at Ana’s apartment!