Sandra's apartment was very nice. It's not too big, but for two persons it was okay. If we had stayed longer, it might have become a bit too small.
The decoration was very stylish and it was clean. There's heating and cooling possible, that was good too.
The location is great. La Latina offers nice tapas restaurants and bars. The central part of Madrid is easily reached by walking. There's a metro statio not two hundred meters away, 30 seconds to walk. A small supermarket is also very close.
Sandra was very nice and showed us everything. She recommended places and sightseeing spots. She was also fast to respond to messages.
Overall, I can recommend a stay there. :)