We stayed almost 3 months at Cayetano's place. The location is great. Located in a quiet street of La Latina quarter, at a walkable distance to everywhere downtown Madrid. It is close to Cebada market for grocery shopping.
The apartment is like described and showed in the pictures. It is the perfect size for a couple. It has not a lot of natural light as it is a first floor facing north. It has a lot of storage. The couch is big but not the most comfortable. The bed is good. The hot water for the shower always worked very well.
Some home appliances and furniture are oldish. The air heater is not powerful enough during the coldest days in winter. But it wasn't very bad and we managed to stay ok during our stay.
The communication with Cayetano was ok. They answered our requests quite fast. You just talk with somebody different every time and sometimes they are not super friendly.
Our global stay was good and we recommend the place.