For a city trip to Madrid we highly recommend this apartment:
Olivier is a great host and cares about his guests. The explanation to get to his apartment was very good and he directly advised us some places where we should go. Every morning we could prepare our breakfast with eggs, fruits, cereals, bread and really tasty home made marmalade. We had a clean private space with a bedroom and a bathroom.
The central position of the plaza Mayor gave us the ability to walk to every important place in the city. We only took the metro to get to the airport.