Oscar's apartment was the perfect place for my fiancee and I to use as a base to explore Madrid. The location is fantastic- walking distance from the famous art museums and the beautiful heart of the city where you will find many restaurants, tapas bars, and stunning architecture. The apartment is clean, secure, and well furnished. Its location on the street and with the bedroom at the back means it is very quiet, so you can also enjoy your sleep! Aircon was not needed in October, though was available, and having wi-fi was a good bonus. Oscar was not available to meet us in person, but he sent his friend Ricardo, who was very polite and friendly. Ricardo was very knowledgeable about the city, and gave us some sound advice on where to go and what to see given that we were only there for two days. Oscar was really helpful with emailing me advance with metro directions from Madrid airport (takes 45 min to 1 h, and good value for 5 euro each). Found the apartment very easily with his directions. While you are at Oscar's, you must try Cafe Melo just around the corner (right out of the apartment and right at the bottom of the road then about 100 meters downhill on the right). It's a no-frills tapas bar that's very popular with the locals, get here for opening in evening (I think it was about 7pm when we turned up though best to check).The specialty is a Zapatilla (giant pork and cheese sandwich), which is delectable and also huge! The house red is also a good drop.