So difficult to put into words how lovely a stay at Maria's place is. She is warm, kind and thoughtful. I felt so grateful to have stayed with her in Madrid. Access from the airport was good, express yellow bus for 5 euros, leaves you 5-10 minute leisurely walk from Maria's place. I didn't use the metro, but seemed to cover the area quite well. The train station for day trips to such places as Toledo, is a 10-15 min easy walk. Her building is in a pretty plaza with lots of avenues to explore right near by-- many restaurants, stores, groceries, just minutes away. The downtown area with the palace, cathedral and plaza de sol, is an enjoyable walk of 10-15 mins, but you'll be tempted to stop along the way at one of the many cafes, to drink in the ambiance!
I felt quite safe all around Madrid. Maria's home is sparkling clean and she always checked in with me to make sure I was okay which I really appreciated. She also left little goodies, which were a treat after a long day of seeing the sights. I wouldn't consider staying anywhere else when I return to Madrid.