We had a long stay at Iren's apartment (almost 5 months) and it was fabulous. Me and my boyfriend loved it! The apartment has all the amenities you need in a daily life, it is nicely naturally illuminated, the beds are comfortable, the bathrooms spacious. The building has a pool and a gym. It felt very easy to live here and feel at home.
The location is perfect! You can find Coyoacán, buses, metro stations, supermarkets, shopping malls, and the Cineteca Nacional within 5 - 15 minutes walking distance!
Finally, Iren and her mother are great hostesses and the communication with them was very smooth and efficient.
I completely recommend this place for both short and long stays in Mexico city!