I stayed at Roumena's place for an October weekend in Madrid. The place is wonderfully decorated and Roumena left an extensive guide with all the info we might need for our stay. The apartment is fully equipped as well, and has more than just the bare necessities you might find in other Airbnbs - the shower was stocked and you won't need to buy herbs and spices if you plan on cooking a meal!
The area is within walking distance of many of the central landmarks, but has its own character, offering an eclectic mix of small shops, Indian restaurants, edgy bars and cozy bodegas. Overall, a great base from which to get to know this wonderful city.