Mixed review - PRO: Julia and Omar were mostly very responsive and accomodating to our needs. The space is very conveniently located at the heart of Condesa. Space is mostly quiet and has all the necessary amenities.
CON: The space is a small extra room constructed on top of a building rooftop and not very sturdy and with little ventilation. We stayed during rain season, and the ceiling and wall started leaking in the middle of the night. Unfortunately, the hosts had already gone asleep and we had to sleep under dripping water on wet sheets. Julia later did offer us a night of stay at a nearby old hotel whose quality was dubious, so there was some inconvenience there. Space is also very small - I wouldn't generally recommend for two people unless they are both small, let alone under leaking conditons.
All in all, a cute and compact airbnb at a great location, but I would avoid it for two people or during rainy season (unless the host has come up with a permanent solution for the roof).