Adding to the chorus of positive reviews... The place is as gorgeous as the pictures suggest, and Gabriel was a great host.

The apartment is both beautiful and functional, and its location in the heart of the old town is perfect. Cava Baja is a very lively street with lots of great bars, tapas joints and restaurants, but no noise carries to the apartment itself. We were a group of six friends, and there was plenty of room for everyone. A must-stay in Madrid!