We stayed at Arzu’s place for a comfortable 3 nights.
Location: 1 minute walk to the Anton Martin train stop. Train is ~1 hour ride from the airport with two or three transfers. 30 min car ride if you choose to take a cab/Uber. Airbnb is a 15-20 min walk to most of the main spots: Buen Retiró Park, Puerta del Sol, the palace, la Gran Via. We took scooters around the city to these places too, making it a much shorter ride. You can enjoy breakfast at the many local bakeries along the main road.
The apartment was comfortable and clean, situated on a quiet side street. Probably for no more than 3 people. The couch pulls out to a small bed.
Check in and check out was simple and Arzu maintained good communication with us throughout.
I’d recommend this unit for anyone visiting Madrid, especially for those unfamiliar and new to the city as you will save money on not having to pay much for transportation.