Ricardo is a wonderful and kind host. He was very communicative, always checking that we had what we needed. His house is very spacious, and the beds are very comfortable. We were there in January when the weather is quite cold at night, so as all houses in the city, it could be very cold... but all the beds had many blankets, which made for great sleep. Ricardo also offered a heater if he wanted. He also provided water, bottle of wine, etc.
The only aspect that I would mention is that some of the amenities are not very modern— the kitchen is definitely in need of TLC, and some of the bathrooms as well. Given this is the Condesa area, I would have also expected a more boutiquey feel to the decoration of the house, but that is a personal question of taste.
But overall, it was a very good stay.