Its not mentionted in the advertisement that the bathroom in the apartament has no ventilation. That is the reason that the unopenble window in the roof of the bathroom is covered in mold. Also all the other windows in the apartament has marks of mold. Its can cause a serious health problems and we think that airbnb shouldnt let apartaments of that standard on their page.
Also if You are coming in the winter have in mind that the apartament has two radiators, one in the bedroom and one in the bathroom, but the one in the bathroom does not work. We reported it to Daniel at the begining of our stay, but he didnt do anything. Its really cold in the apratament because of that. If You are planing to ventilate the apartament because of mold the temperature is going to be so low that You are going to get sick (we got sick, and left early).
Apart from that the apartament is beautifull. It's perfectly located, walking distance to everything but also 3 min from the subway. Size of the apartament is perfect for two and the wi fi is working very very well. The apartament is fully equiped and huge asset of it is a coffe maker.
If Daniel gets rid of the mold we would love to come back to his apartament in Madrid!