My boyfriend and I stayed at Ruben's apartment and we loved it! The location is just amazing ( 1 minute away from Plaza Mayor!) and Rubén couldn't have been a better host. He waited for us to hand the keys in as we arrived quite late in the evening and he was most helpful! He even booked a table for us in a very trendy restaurant. So if you are looking at staying in Madrid in a central location just choose Rubén's place :D