We had a very short but great stay at Marta's chic urban apartment.
The location is 10 minutes away from the main station at Atocha ( & Reina Sofia Museum) and another metro station.
The main hub of Sol is also a 15-20 mins walk if one wants to avoid public transport. All in all, it has a great peaceful location and is very accessible.
Marta was at the apartment to receive us. She is very cheerful and explained everything about the apartment and the surrounding. She gave us a map and marked main attractions in Madrid for us. This was helpful.
The apartment is very well done and stylish. The bed and the extra bed , both were comfortable.
We had a short stay, however a street with a lot of great looking bars was a 5 minute walk. It looked like a great place to explore.