We really enjoyed our stay in November. The flat is as described in the add and corresponds well to the pictures. Raul was there to great us a 00h because the key system was faulty so we didn't have to wait.
The flat is very functional and we'll equipped. The only downsides are that there are no Fensters and the isolation to noise is poor. We could still sleep very well because the bed was so comfortable.
The checkout worked out fine.
Raul is very kind and welcoming and we definitely recommend his flat in Madrid.