I stayed for three months from January to March. It was the best long stay I've had through AirBnB.
The good: Self check-in. Two sets of keys. Beautiful comfortable and bright apartment. Historical features, brick wall, wood beams, traditional windows. Nicer than the pictures. It was well equipped for a long stay. Balconies on both calle alta and calle baja. Smart TV, Aircon and heat. Great mattress. Shutters block out most noise. Walk in closet next to the bathroom (not in pictures). In unit washer.
The bad: You have to take quick showers as the hot water runs out. The upstairs neighbors are loud. They frequently have people over on the weekends and play loud music during the day but they did turn it off when I knocked. Occasional bad smell in the bathroom and washer, but honestly it wasn't as bad as previous reviews made me think it would be.