This is a great place...close to all main attractions and walking distance to metro stations and Gran Via. Marlen, our host, was awesome. She went out of her way to get make us feel at home - from meeting us at the apartment to setting us up with restaurant reservations and providing tips on the area. She was also extremely prompt in responding to any questions we had. That is the hallmark of a great host.
If you are thinking of staying in Madrid, look no further!