Our stay at Victor & Yoli's place was great and far exceeded our expectations - the place was clean, well equipped and well furnished - we had a blast cooking breakfast everyday while listening to music via bluetooth (there are two supermarkets close by).
the location was excellent as it is literally less than a minute walk from the Palacio Real, a 5 minute walk to the Opera house (and its underground station) and about a ten minute walk to either the Temple of Debod, Plaza Mayor/San Miguel Market, Plaza del Sol and Gran Via.
Victor is super responsive via WhatsApp, overall - Highly Recommended!