The flat is really great, next to the shopping street Gran Via. You can go to most of the places by walking, no need to take the metro. There are many good restaurants and bars, also supermarkets close to the flat. Melvin is a great host, one evening we've left the keys inside the flat and he came in less than 5 minutes to let us inside and pick our keys. In the flat you have all you need, and it is also very clean. I can only recommend it, it was a nice weekend in Madrid.