Jose & Maria's lovely little flat is in a quiet part of Madrid, just south of Retiro park.
Aside from being very hot in the flat (it has air conditioning, but not in the rooms), the flat itself was very clean and homely. An easy walk to the nearest Metro station, and a slightly longer walk to an area with plenty of bars and restaurants, it is in a good location.
We didn't meet the hosts, but communication was clear, prompt and friendly. Gracias Jose and Maria!