We stayed a month and were sad to leave. Alberto is one of the best hosts: proactive, responsive, accommodating. He has a friendly manner and was wonderful to deal with. His assistant, Sonia, was super helpful and easy to get in touch with.
The apartment are better than the photos show. It was very quiet (it faces the back of the building, not the street) and was bright. For the two of us it was comfortable and homey.