My wife and I loved our time spent in Marcos' apartment in Madrid. Communication was great as Marcos was very helpful at anticipating any issues that might come up from an early landing flight to local recommendations, especially restaurants. Check in was a breeze and the apartment was clean and spacious.
The apartment was centrally located and within an easy walk of many of the attractions we wanted to see, Reina Sofia, Prado, Plaza Mayor, Gran Via....etc. This, combined with Marcos' many excellent suggestions on places to visit or eat made our time in Madrid some of the best we've had in Europe. I would highly recommend staying here!