We went to Leo's and Gretel's place for one night in times of Corona because we had an ongoing flight for the next day. The place fulfilled our expectations, it was comfortable and close to the airport, the communication and arrival was super easy.
From the Barajas airport (T4) you can even go by city bus #827
(direction Canillejas), just paying 1,50€, it didn't take us longer than 15 minutes)