I can highly recommend a stay at Victors apartment! It's cosy, bigger than expected and really quiet. There is even an aircondition in the bedroom. The metro is only about 5 minutes away.
Victor was a great host! He responded quickly to my messages and helped us when we had questions. It was possible for us to check-in early and check-out late, which was great! If I come to Madrid again I will definitely stay at his apartment!