We had a great stay at Raul’s. The location is amazing and very close (2-3 minutes) from the nearest metro, Bilbao, which made it very easy to get in, out and around of the city.
The flat is very cute and clean, the two bathrooms were great to have. Hot water only last two showers but we were given fair warning there. One of the beds was significantly less comfortable than the other but overall no complaints - we were very happy!
Would definitely recommend this place to stay while in Madrid.