Great place! Wish we could have stayed longer than the two days we were there. Mariana is a good host and was responsive when we had questions about getting in, and the location in Condesa is awesome for shops and restaurants. There's a good bookstore, a market, lots of restaurants and several banks within a few blocks!
The apartment is cute and comfortable with some road noise due to the location, but which also makes it very walkable to anything you'd need. The building is old so the whole floor is a bit wonky, but Mariana has furnished and outfitted it nicely to make it feel cozy. Follow the instructions for the water heater and you'll have great water pressure and easy drinkable water out of the filter by the sink in the kitchen.
The kitchen is equipped well enough for some light food prep in the mornings before you go out to the shops and restaurants during the day. WiFi worked great as well. We would definitely stay here again