Lucía's place is very centrally located in a beauty neighborhood in Roma Norte. Easy access to food and coffee are literally around the corner. Ask her for recommendations! She is very friendly and helpful.
I was a guest for a few days and every day it was quiet and it was also easy for me to get up and out without disturbing anyone. Everything was ready when I arrived and the apartment was clean.
The bed is very comfortable and I had a hard time wanting to get out of it in the mornings but coffee and food beckoned.
You can easily walk around this neighborhood. If you want to see more touristy places I recommend taking a taxi but they aren't costly to do so.
I would definitely stay with Lucía again when I return to MC. That's the highest praise I can give.