I think it's basically a normal dormitory. The location is great, right next to Sol subway station, but the area gets quite crowded in the evenings and at night. (Maybe it's because I stayed there on Madrid Day, a national holiday...) There are no curtains on the beds, and the shower in the room doesn't have a lock on the door, so if you're a woman and this is a concern, I recommend the women's only dormitory. For some reason, the bed I was initially assigned had signs of having been used, so I asked to change rooms, and they were happy to do so. The safe in the room can be used for free if you ask the front desk. Laundry is only available until 9pm, so I used the nearby laundromat. I was very happy that all my roommates were friendly and helpful.
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