Good location, easy check-in. Not really an apartment, it is a room within a larger apartment. The room is not bright at all. The window give on to a dark inner patio, so the only light is artificial. The room itself is quite small. They use very strong smelling cleaning products, which is terrible for people who are sensitive to toxic smells, especially considering that there is no airflow from the inner patio to air out the room. They should use non- perfumed cleaning products. Another annoying thing. The original page said the price would be 20 euros less than when I actually went to reserve (not referring to the cleaning cost), I chose to book it anyway, but I feel that it's a misleading. The bathroom was small, but quite nice. Good shower. I think the price is based entirely on location, the room itself is not worth the price. There are much nicer places in Madrid center available for similar prices.