My wife and I greatly enjoyed our 5 night stay and looked forward each day to watching the activity at the park right across the street.
The apartment was very well decorated, in excellent condition, only 5 minutes from Insurgentes Metro and a good grocery store, and the kitchen was fully equipped. Margarita's husband, Rafael, was very helpful and provided some very useful maps for us. We would highly recommend this apartment.
We did mention to Margarita that future guests might benefit from a fan to circulate air in the bedroom at night when the windows were closed to keep out some traffic, barking, and other noise, that they might benefit from a cable TV subscription that included a few all English channels, and that a bed larger than the current double would be nice. She kindly informed us that none of this was necessary as they liked the apartment just the way it was.
Overall, one of the most elegant places we have stayed at with a great feeling of old world charm.