The building was old but once you get into apartment, everything was clean and well managed. I couldn't meet Cristina but neighbor lady handed over key who could not speak English but thanks to Google Translate ;-)
I enjoyed communicating with her..
Neat and clean, in center of town.. A lot of small shops for mobile, eating, grocery around apartment which remain open till late night. For location, its 5-8minutes walk from Atocha.. Which is one of main train stations. From here, access to airport is also very easy
Sure next time and recommended :-)