I highly recommend Arturo’s place. I just had a wonderful stay for five days. It is in a great area, just NE of the Coyoacan neighborhood. There is a small park at the end of the street, and a major road with lots of stores and restaurants just a block further. It’s less than a mile to the metro which will take you to the centro/zocalo.
The place itself is in a gated community, making it very secure and private. Arturo is on-site and very accessible. The apartment has a nice sofa, TV and desk, and nice high ceilings. The queen bed is very comfortable. The shower has decent pressure/hot water, and there is a large closet. There is a refrigerator and coffee maker. It is relatively quiet and perfect for a short stay in Mexico City.