Don't particularly recommend this place to stay more than one night.
Good things are the location is perfect and the place is clean.
However the place is like a cave so there's no natural light, directly on the street so very noisy, but the biggest problem is the humidity in the entire place that leaves clothes, sheets and towels damp, an awful sore throat and a very uncomfortable smell of mould, there's an A/C but no ventilation so doesn't help with the air issue. Must also say that the place is not soundproof at all so we were waken up every morning by the road works and labourers next door, if you go to Madrid to enjoy the night life it's impossible to sleep in the morning.