Very quiet, private apartment, with a lovely balcony, and a fantastic elevator. Loved the neighborhood, which is a ten to fifteen minute subway ride from EVERYWHERE, and I felt incredibly welcomed by the community, which has lots of fun and cheap places to eat. I didn't see much of Carolina during my stay, but I don't think I had to wait even five minutes for a reply when I shot her a question; Carolina was always ready with great directions and suggestions for me, which I really appreciated. Madrid in an incredibly cool, friendly, and fun city, which Carolina encapsulates. I highly recommend this booking, and Carolina as a host: she's a star.