We had a really great stay, location is excellent, just out of the range of a really lively street but close enough to enjoy the atmosphere and leave when you’re done! The apartment is quite small, fine for dropping in and out, getting snacks and coffee but I think if I had a longer stay I’d want a bit more room. One of the bedrooms doesn’t have a window which could be a problem if you get claustrophobic. Generally perfect for a couple of days walking around the city, especially great if you come in and go out via Atocha Station.