We had a great time at Conchi's place! The flat is really nicely decorated, super clean and comfortable (e.g. good bed, shower, kitchen etc.). The location is good: it's a nice walk to the city centre through Retiro Park and easy to get to the airport. Conchi and her husband were really friendly and helpful (they were really flexible when our flight was delayed and welcomed us when we finally arrived at 2am). We had a lot of fun exploring Madrid and would definitely recommend staying here!