My partner and I spent just over a week at Fernando's place. It was my first time in Mexico City and I was a bit nervous about my trip, thankfully Fernando exceeded all expectations. The location of his apartment is ideal, as others have said: close to exceptional restaurants, bars, shopping, and within walking distance to hip Condesa.
The apartment itself is huge and tastefully decorated. Fernando is the most responsive and upbeat host I've ever had the pleasure of staying with. As well, the doorman and staff in the building were extremely helpful and always courteous. I felt like I was staying in a second home and not an airbnb.
The only negative for me, is in part positive since it's due to how much light the apartment receives during the day -- it can get a bit warm and stuffy at night, even with fans, after a warm day... and you're on a busy street so it's nice to keep the windows closed. Nonetheless, I've come to find out that this is the norm and not the exception of staying in Mexico City.
Thanks Fernando!