The apartment was great; same as pictures, clean, enough space for 2, close to metro stations (Noviciado and Puerta España), 3 minutes walk from Gran Via, well equipped (hair dryer, iron, kitchen utensils) bed was comfortable, wine, beer and water as courtesy of our host.
In regards to the host, Melvin couldn't be better. He was flexible (he received us earlier than check in time, allowed us to drop our luggage in his office while the apartment was being cleaned and find us another great apartment since we needed to stay one more night in Madrid)
Nothing else to say, but positive things and to recommend this apartment 100%