Our stay was great :)
The apartment was with perfect location - a quiet street, 10 min walk to a metro station and near a lot of restaurants (with delicious tapas). It is in the center and there was no need to use any public transportation.
Miguel was very fast with the responses and we have no problem with the communication.
The apartment was clean and cosy, if it is too cold you can turn the heater on - so no problem with that as well. The only negative aspect I saw was that the walls are a little bit thin and sometimes you can hear your neighbours. But rather than that it is perfect :)