Good location, which means you can walk to the airport, about 30 min. I walked to the Terminal 1 and took the shuttle bus to Terminal 2 for free! Check your time in advance, cause the walking route is not that obvious.
Flat is neat and Alex and his family are very nice! Pls note there is no air conditioner in bedroom, so if you want to go to Madrid in a hot summer (as the max temperature when I stayed there is 40 celcius degree, but that is not usual), think twice!
Overall, this is a good place for the price.