Prior to the trip we kept in touch with Victor and Yoli and they were quick to respond to any inquiries . We paid an extra night so that we could access the apartment in the morning when we arrived from Canada. Victor offered to arrange transportation from the airport and that was very much appreciated. He met us at the apartment and was very good at providing instructions.
The location of the apartment was very good. If you are able to walk, this is a perfect location as you are near the Center.
Re: the apartment . It was very clean and spacious for a group of 4 and nicely decorated, however the couch and chairs were not very comfortable . The bedrooms were large and the beds were comfortable . The only criticism we had of the beds is that the pillows were as flat as pancakes. The street noise from the bedroom closest to the front entrance was pretty loud and lasted until the middle of the night . We needed to wear earplugs .
Overall it was a great apartment and the hosts were very friendly and available if we needed anything . If we ever come back to Madrid we would stay here again.