I cannot say enough how wonderful our stay was at Alvar's flat in Madrid. He was incredibly accommodating with our flight delays, staying late for us to be able to check-in, and gave us a ton of great advice on areas/places of the city to experience. The flat itself is VERY cool, and we certainly spent most of our time up on the rooftop, nursing a bottle of wine and people watching in the plaza as the sun went down. High recommend!!