Carlos' apartment is in one of the best locations we could have dreamed of! We ate at Cafe Nin every morning, and became familiar with the staff there. The apartment is perfect walking distance to the shops and restaurants of Juarez and Roma Norte.
Note: the unit is very dark and daylight does not shine through, so this is not the place for heavy sleepers who need sunlight to wake up. The bathroom is also pretty tiny, which is to be expected in a city apartment.