Miguel's place is in an excellent location, close to parks and many shops and restaurants, in an area that feels more "local" than touristy.
From a functionality standpoint the apartment offers solid value for money by Mexico City standards, and delivers on all of the traveler requisites like fast/reliable wifi, full kitchen (even with a stacker washer/dryer, a nice plus), updated bathrooms, and the added security of a 24hr doorman.
(For the record, this was my first trip to Mexico City, and I walked around this neighborhood and many others, alone, at night, and never once felt threatened or unsafe. It certainly helps that there always seem to be people out and about, even late at night.)
Miguel himself was an awesome host, one of the most responsive I've experienced on AirBnB, and went out of his way to turn the apartment around quickly for me as my flight arrived in the morning. Many thanks Miguel!
As for the comments about the street noise: Yes, it's there, but it wasn't a big bother for me. Lest anyone forget, you are coming to visit one of the largest/densest cities in the world in terms of population. You get to experience the fun of walking home at 11pm or midnight and having your pick of bars, restaurants, and street vendors still open and ready to serve. So yeah, there's going to be some noise at night. There's a nice fan in the apartment, though, and the white noise from it running was enough to drown out most street noise and I slept great, no earplugs needed. If you are a super light sleeper, though, it might be an issue.
As for me, I'd return with no second thoughts.