The apartment is very conveniently situated, quite close to Retiro Park and in (a bit longer, but super nice and interesting) walking distance to the city center. The supermarket is right there in the building, the other one down the street for another 5ish minutes, some eat out options are super close as well. It is cozy all together, very well equipped even for a longer stay. We had some cold days during our stay, it could be a bit warmer in the flat if the insulation was better, but probably this is not really a need in Madrid on regular basis. Still, the conclusion is, with Ivan being an excellent host we had a nice time staying here..