Cristina's apartment is well situated right across the street from Madrid's Atocha train station, the transport hub for access to the rest of the country. Check-in process was very easy, and Cristina and Barbara were very helpful and quick to respond (and had pictures ready to go to help when explaining things). The apartment was exactly as described (though a little small) and very well decorated. The place was completely spotless and smelled AMAZING- I felt like I was staying at a 5-star boutique hotel. Really great stay!