Gonzalo's apartment was very clean, quiet and beautiful. The location was perfect. Cava Baja is full of great places to eat for very reasonable prices. Do not hesitate to venture to the north or south of Cava Baja as you will find wonderful restaurants and bars in the winding narrow lanes if you make a right turn at the end of the block. To the north you will find the historic center of Madrid. Plaza Mayor is a 3 block walk north and Sol is just a couple minutes north of that. We used Sol as our main Metro station since it was so easy to walk to and has easy connections to Atocha train station and everywhere else you would want to reach in Madrid. Lastly I have to agree with others that Gonzalo's place was very quiet. We could not have slept better there. Everything was very comfortable. I would definitely try to stay here again if I return to Madrid.