Hands down to the most responsive and helpful Airbnb host I have ever met. Bianca's apartment is in a great location in the best neighborhood in Mexico City - safe area (tons of police patrolling all the time, which evidently is a good thing in Mexico City), super convenient location (tons of restaurants right under the apartment, grocery store across the street and a pharmacy right in front of the building), walking distance to nice parks.
The building is aged (like most of the buildings in Mexico City), so do not set your expectation for a brand new feel. What you can count on is that the apartment will make you feel safe, comfortable and homey.
One tip: if you are staying with a large group, make sure to wake 10-15 minutes between each shower. The water is hot and the pressure is good , it just requires a bit time to heat up water...