My wife and stayed at Alejandra's apartment for two months on a working vacation. Its location is ideal because it provides easy access to the Condesa and Polanco neighborhoods, and Chapultepec Park. Also, the street where the apartment is located is quiet and has many trees. The apartment was very clean and had everything we needed. The wifi was fast but it does not extend to the bedroom. However, there is a nice desk in the common area and the dining table is large enough to act as another work space if necessary. The neighborhood and the building itself are very safe.
Alejandra was highly responsive to our questions and extremely helpful. For example, when we asked her for a recommendation for a private Spanish instructor, she researched on Facebook and found a great one who I have continued to work with since returning to the U.S.
Overall, we thoroughly enjoyed our stay and would stay there again.