The apartment is located on a very quiet street in a lively and popular Lavapies neighbourhood with lots of bars and restaurants, close to the center of Madrid (10-15 minutes walking distance). It is very well organized and equipped and in perfect condition. The entrance of the building looks a bit messy but that's normal for this area and possibly part of it's charm, being an old, unpolished part of Madrid with old buildings and steep narrow streets.
The alternative vibe of the area and the fact it is close to most interesting attractions of Madrid is why I would gladly stay here again.