Carolyn's flat is def well located, few steps only from the metro "Tirso de Molina" which is a great area downtown, and where you can find everything you need.
The flat is very clean, well equipped, big and comfortable (we were a family of 4). A good place to try out in Madrid! Last but not least, the communication was smooth and easy which facilitated a lot our coming and going. Big thanks to Carolyn & Dani