Carolina was far and away the best host I've ever experienced using AirBnB. She went out of her way to connect with us in advance, mostly because we were traveling on Xmas day and she was concerned that nobody would be available to let us in to her apartment. In the end, she mailed us the keys several days in advance which made the check-in completely seamless.
Carolina and I stayed in regular contact throughout. She gave me local tips, restaurant recommendations and just generally made sure that we were enjoying ourselves. I cannot stress enough how wonderful she is.
While it's in the best location in CDMX, across the road from Park Mexico and in the heart of the Hipodromo / Condesa neighbourhood, the unit itself is in need of a bit of TLC. It's a nice, large, clean space and the high ceilings and art deco design are really lovely, but it shows its age, particularly the bathroom. If you're looking for an affordable, centrally located spot with an amazing host, this is the place.