Elizabeth and her mother were very friendly and welcoming. We arrived later in the evening (although not late for Madrid!) and there was no problem. Elizabeth responded promptly to my questions in advance and sent us a long list of recommendations for restaurants, etc.
The apartment is basic - sparsely but nicely decorated. One bathroom, small kitchen. The area of Chueca is fantastic, and the apartment is right in the center of it. Great shops, restaurants, access to museums and parks. We really enjoyed it. A note (that has been mentioned in other reviews): it is noisy on the street until very late. It was difficult for some members of my party to sleep because of the noise. We turned on the fan on the air-conditioning/heating unit, which helped to drown out the noise. Besides this, it was a lovely stay.