Norma's apartment is perfectly located in La Roma, close to very nice restaurants and bars which I enjoyed a lot, specially the guy around the corner selling fresh juices every morning.
The apartment is very roomy, which is something I was looking for, and I was able to relax and work there during the day.
Also Norma was always very responsive and even her dad came once to help me with the water boiler, great service!
A quiet apartment is not a common luxury in Mexico city, so just keep that in mind.