We really enjoyed our one week stay at Dulce's apartment. The apartment is very well located on the edge of the neighborhood of Roma Norte. Just a few blocks away are lots of fun cafes, restaurants, and bars, as well as two grocery stores.
The apartment itself is comfortable. The building can be a bit noisy, but once you are inside the apartment, it is very quiet and peaceful. The only issue we had was with the temperature of the water in the showers, which was erratic and went suddenly from hot to freezing. But I imagine this is a problem in the building and not particular to Dulce.
As for Dulce, she was extremely responsive and kind to us. We had a problem with the kitchen appliances one day and she dealt with it within hours. She was always quick to respond to our requests and generously allowed us flexible check in and check out times.
Would definitely recommend her place!