I stayed two months at this place. The house is well locaded, with a walking distance to Coyoacan Center of 15 minutes. The room was alright, a bit old but okay. The bathroom was relatively clean but also quite old. Zaira and her parents were nice and tried to help me when I needed something (for example to find a dentist or a language course).
However, I can not really recommend the place for a longer stay. There is other people living there, with whom you share the kitchen and bathroom. They rent the rooms normally and therefore the whole place works more like a shared flat than airbnb. I always had to ask for new toilet paper, until I was informed that normally everyone had to buy it on their own. The towel in the bathroom was washed maybe once or twice during my stay, and I had to tell them as well to do it. At the end of my stay, when I understood that they wanted me to buy my own toilet paper and product to wash the dishes, I had a talk with Zaira and told her that I was paying a lot more than the other flatmates through airbnb and therefore would expect at least that they offer toilet paper. She was very friendly and said she would change this directly, which she did. I think Zaira and her familiy will learn a lot in the future how to handle airbnb and the service that guests expect. However, when I was there I was quite disappointed and thought that the room was really overpriced for what I got. On the other hand, if you are staying for only some days, you might not recognize those things so much. Just take care of the older Lady living in one of the rooms. She is quite crazy and tried to tell me which bowls I was allowed to use for the salad and which not etc... I found her really annoying.
I wish Zaira and her parents all the best and would advice them to take a bit more care of the people coming to there house through airbnb and be more concious about little things in the future. Then I think this place will become a good place to stay, as the location is really good.