I spent 2 nights with David in Madrid and couldn't have asked for a better host. He was very responsive before I left the USA and then a few days before arriving, he checked in again about a mutual time to meet since I wouldn't have a Spanish cell phone and was coming from another place in Spain. He gave great directions on how to get to the apartment from the train and metro station. David did a great job showing me where everything was and had even cleared a spot in the fridge and in the kitchen in case I needed to store anything. The room has a ton of storage and was meticulously clean. The bed is comfortable and quiet as the window faces an interior courtyard, not the street. The bathroom was also incredibly spotless and modern. Typical of Europe the shower was very small, but the water pressure was very good. In the room were written instructions about the apartment and recommendations for where to eat in the neighborhood. He also has a bunch of brochures, maps and guidebooks that were very helpful. It was very hot in August and the apartment isn't air conditioned but the room has a fan which definitely helps on hot evenings and the apartment stays fairly cool.
Only having one full day, I decided to take the Madrid city tour bus, and one of the early stops on the main route is only a short 2 blocks away from the apartment on the Gran Via which was very convenient to access. The apartment is right in the center of all the main sites of Madrid so it's a good launching point for sight seeing.
I had a very early flight out of Madrid and there is a 24/7 airport shuttle within a quick 12 min walk of the apartment which for 5 euros takes you directly to Terminals 1, 2 or 4.
Would definitely recommend staying with David to anyone! He was very friendly and made himself available to chat, but also very respectful of my privacy. Perfect host!