The apartment is perfect for your stay in Madrid. It was very clean, it has all the amenities and the location is great. The metro is in the corner and if you learn to navigate it, there is no need to use anything else as transportation, you can get to the apartment from the airport on the pink line on the metro. The hosts were excellent communicators, Marina helped us a lot by giving us information on everything that we needed to know about Madrid. The week before arrival she sent us emails with pictures of the must see places in the city and even included a map of the metro w instructions on how to get to the apartment upon arrival. Marina was also kind enough to let us leave our luggage early before check in bc we arrived early in the morning. She is a great host who is knowledgeable and passionate about Madrid and her sister Anna and her make sure to give you the full details of the apartment when you check in (and she even had an umbrella for us on the first day we arrived it was raining). Everything was excellent, the only thing that made my husband and I uncomfortable was that Marina got very upset when we asked if she had taken the remote control for the A/C unit in the apartment. The amenities on the airbnb listing include A/C unit as part of the apartment and she prevented us from using it (had we wanted to) by purposely taking the remote. Luckily we didn't need it since the nights were cool and leaving the window open sufficed, but there were some noisy neighbors up between 1 a.m. to 5 a.m. making loud moaning sounds all night that didn't let us sleep, too bad we couldn't close the windows...
In all if you visit Madrid in the fall or winter this would be a great place to stay but if you like using air conditioning then stay somewhere else because it is a sensitive subject for the host. Eventhough, she was very helpful, knowledgeable and clean.