Pilar's flat is a small, but wonderfully clean, maintained and equiped one. Pilar was a very friendly host, flexible at both arrival and departure, also giving us some nice tips about the city. The flat is close to the city center (everything is in 10-15 min walking distance) , we didn't need to use any public transport. The flat is in a small courtyard which makes it very quiet. You have a wonderful shop on the corner selling fresh seafood with very helpful and welcoming staff, it was a pleasure to enter every time. The district (Lavapiés) is a very international one, offering all the benefits of many cultures (shops, restaurants for every taste and from every continent) but also facing the difficulties of so many people living together (with a little common sense, avoiding a few streets and squares after sunset, we felt safe during our whole stay).
All in all it's a strong recommend, would definitely come back again.