We (my son and I) just spent three days at Carlos' apartment. The apartment is well located, in Lavapies, near the Prado and the Reina Sofia musems. The neighborhood is lively (cafes, restaurants, markets) and convenient, just in Madrid's center. In spite of this, the apartment is remarkably quiet: it is on the top (4th) floor of an old building. It has a nice sunny terrace; everything works quite well: kitchen, shower, air conditioning, wi-fi. We briefly met Carlos at check in: he is a nice interesting person and we found it very easy to understand each other (besides, he speaks excellent Italian and English). Space in the flat is limited but it has been intelligently organized and is put to use in a very efficient way. In my opinion, it is quite adequate for a party of 2 or max 3 people who are already accustomed to living together. I would surely recommend the apartment to 1-2 persons who would like to spend some time in Madrid's center and who do not mind to walk up to the 4th floor: they would be rewarded with a quiet and comfortable space and a nice terrace.