Krishna is a great guy, that give you very good recommendations about what to visit or what worth seeing in Madrid. The place (Lucero) is only 15 minutes by metro or 1 hour walking. One negative things is that in the room heating works only from November. We visited Madrid now in October and in room was cold and two blankets didn’t help us too much. The bed is exactly for 2 people, but rather for the couple than two friends. But generally I would definitely recommend to utilize Krishna’s flat mainly because of him and the location.