Mauricio's apartment was perfect for our week in Mexico City! The apartment is exactly as the pictures are, very clean and very comfortable. As others have noted, it is at the intersection of two very busy streets, so the street noise in the corner bedroom can be loud if you are not used to it -- earplugs may help. Both rooms have light darkening shades, which worked well, and the beds were very comfortable.
The La Condesa neighborhood was very walkable, with many restaurants, bars, stores and grocery stores nearby. The check-in with Bertha was very easy -- she does not speak any English, and we know very little Spanish, but used Google Translate and that helped us communicate.
One thing to note: There is a locked door to get into the building, and they have a doorman available 12 hours a day. There is a key to get into the building if the doorman is not there -- take it with you when you go in case the doorman is away!
Mauricio was very quick with responses when we had any questions, and the communication was great. Overall, a great place to stay!