My family and I (eight in total) had a wonderful week at Ernesto's place. It's a beautiful home, perfect for large groups. The layout --one bedroom and bathroom, living room, dining area and kitchen on the first floor, four bedrooms and two bathrooms on the second floor, arrayed around a rectangular hallway-- ensured that everyone had both privacy and communal gathering space.
Ernesto is an incredible host. His responses to our questions were almost instantaneous, and he provided coffee and cookies as a welcome. Beyond that, he is such a kind and helpful person. He also put us in touch with his friend Luis, who in the course of the week became our friend too - we spent a fascinating day at Teotihuacan, arranged by Luis, who speaks six languages and whose knowledge of history and culture is seemingly limitless.
The house itself is located on a very quiet street in beautiful La Condesa, which we all agreed was a perfect neighborhood. So many restaurants and shops, from tiny street trucks to large and gracious places, so much greenery, wide avenues with walking boulevards down the center. So easy to walk everywhere or take an Uber or the clean and well-run Metro system. We highly recommend Teotihuacan, Chapultepec Park and castle, Zocalo, the museums, Frida Kahlo's Casa de Azul, and wandering around soaking up the city through the soles of your feet. This was a perfect trip. We will recommend Ernesto's house to all our friends and family, and it will be our first choice should we return to Ciudad de Mexico.