The apartment is lovely reformed and is located in a very safe and really nice area with lots of cafes for having beautiful breakfasts in the mornings.
Two minor things:
I was not aware that the apartment is on groundlevel floor. So the sleeping room is exactly on the height of the street. Streetnoise was actually no worry at all, as the street is really calm, but some other guests leaving/entering the building can be a little louder.
In December there were some construction workings behind the wall of the patio going on, so we could not make much use of it.
All in all still a good apartment, and I still would recommend it if you are going to Mexico City for a few days.