Teresa is a very kind and helpful host. She helped me with everything, I did not have any problems. Her place is very confortable, clean and calm. You can get to the city centre pretty easy. While going to centre by bus or by foot, consider visiting el Retiro park, I recommend you this place - it is very nice. To sum up - if you consider staying in a nice and calm place in Madrid for a very reasonable price - you have found a good option.