First of all, I would like to say thank you to host - Chistina & Luiza. They are very nice and helped us a lots. We had trouble at the station and Luiza took us to Police station. Take a good care for us. Many thanks.
For the apartment, it is really really cozy. I love the design so much, so so much. It was very clean and comfortable. For the location, it is very close to ATOCHA metro, only 1 minute left.
I am highly recommendation for anyone who planning to visit Madrid. ^^