We stayed with 4 (1 couple, 2 friends) in Angel's apartment and it was perfect. We had a friendly welcoming and an extensive email before on Madrid and the best ways to get around. The apartment was clean, had everything we needed, incl. tv, iron and hair dryer. And we were extremely happy with the air conditioning, which made sleeping very comfortable. The neighborhood is great, with a supermarket nearby and also a taxi stand. It is on the edge of the old center, so its easy to get around on foot. All in all a very good choice for a small group of friends, 2 couples, a family or even luxurious spacy for 1 couple.