We stayed in Alejandro's apartment for almost 2 months and had a very happy time there. The area is safe and only 10 to 15 mins walk from the best part of Condesa or a bit more to get to Roma. You will be spoilt for choice for bars, restaurants, markets etc.
The apartment lives up to the photos and is very well equipped. When we did have a query, Alejandro sorted things quickly.
The building is a well designed restoration of a protected 19th century villa and has a resident security guard who is friendly and helpful.
Local services are good eg charming family run dry cleaners, good local market, family park all within 200m.
Taxis are easy to find and take about 20 mins to central areas like Reforma and Polanco (good if you are working like we were).
Overall, very highly recommended, especially for longer stays.