I have to say that this place is absolutely wonderful. Very close to the plaza, where the church is located. The bed, the linens, towels, every detail was taken care of.
I stayed on the second floor and my bedroom had a beautiful terrace.
It is a quiet place even though is located so close to the main square.
At arrival Cristian was waiting for me at the door. He is a very polite person and was attentive to any request or question I had.
The only thing I would note on this place is that if you open the terrace doors at night (there is no ac), mosquitos do come inside the bedroom.
When I arrived, I was given a electrical fan (pretty good one) and because the night was not hot, I did not turn it on. That was not a good idea. I had several mosquito bites on both arms, face and my back the next morning. The rest of the nights I just did not open the terrace doors in order to go to sleep.
I did mentioned this to Cristian and I am sure they will find a solution. But in overall this is a wonderful place to stay while visiting Mexico City. Frida Kahlo's house is very close (get your ticket's in advance). There are plenty of cool and tasty places to eat (Christian has a very good list of places to try). You feel very safe around the area. I would recommend this place to anyone.