The flat is clean, has clearly been recently refurbished and is located within walking distance of most of the major paces of interest in Madrid.
Ruben is a great host; there was plenty of communication before the stay and he gave us advice about how to find the apartment prior to our visit. Ruben took time to give us some advice an show us around the flat on arrival , despite our arriving a little bit late due to some transport problems, and was friendly and helpful.