As countelss others have said, Ximena is an incredible host. I am a frequent Airbnb-er and she is the best host I've had. She will make recommendations, reservations, and help coordinate any parts of your stay you might need.
The apartment itself is lovely. Absolutely perfect for 2; modern and clean with a balcony overlooking the Paseo de la Reforma.
We got massages at the in-building spa (cheap!), swam in the gorgeous pool every day, sunbathed in the private oasis, and watched the sunset overlooking the Monument. The building itself is fantastic.
There's a panaderia+cafe on the first floor that's open early and closes late - a great spot for breakfast or evening churros. The location is so central, it's a quick Uber ride to all the sights/restaurants in Centro Historico, Jarez, Roma, La Condesa ... a longer ride to Polanco because of traffic.
Wish we could have stayed longer, and would absolutely stay again. HIGHLY RECOMMENDED.