Cesar was warm and welcoming and gave us a good overview of Madrid. The apartment is very comfortable and we easily felt at home there. There is good Wi-Fi and the apartment was quiet (with the doors closed), even though it faces a street which can get noisy.
Cesar provided a very useful map with recommendations for restaurants, local supermarkets as well as other shops. He also put together a guide that he put together of Madrid neighborhoods as well as the major sights, which we enjoyed reading. He was easily accessible by phone when we had questions about the apartment. The apartment is comfortable and in a wonderful location.