Carlos was a fine host and the location is great for getting to the airport. The space was very nice, clean and roomy. Bathroom great, bed super comfortable. As you come out of the metro, the building will be across the street to your RIGHT. Carlos was there to meet me, show me the space and how to use the keys for entry. WiFi was great. I walked down the street 2 blocks or so and had a great tapas dinner at Marti 13. Left the next morning for trip back to the US.
I had used the Metro a few times in Madrid but I wasn't prepared for putting extra money on my ticket to get near the airport. In hindsight I might have take a taxi from Atocha station out to Barajas ( I was coming from Seville.)