Very central area and directly in the center if madrid. The place was very quiet and also comfortable.
Due to the fact that it's a underground appartment there's no fresh air and sunlight, and also the area and the apartment is quite noisy. That's probably because of the night life. it's also not very good isolated, so that you hear everyone entering upstairs. would recommend it for couples but not for friends, because there's a open bathroom with the toilet inside the shower.
The host provided us additional information and was very kind.