I read many of the reviews and thought some of the issues were just fluke things but some of them happened again to me. First I will say that there are pros to this place. The cost is great compared to some of the places you can get in Barcelona and the location is unbeatable. They also have lots of perks, like water, soda, beer and wine for free. They also have a washer and a dryer which after a week of being in Madrid was a very welcome thing.
However, not that they can help it but there is a lot of street traffic, especially it being Halloween so noise can be an issue. But my main complaint was with the cleanliness of the unit, there was long black curly hair all over the room and shower. The towels were somewhat stained and the blanket on the bed looked like it hadn't been washed in a while. The A/C also leaked and kept me up both nights. Their solution was to give me a bucket with a towel in it? It still made noise dripping on a wet towel. Overall, I wouldn't recommend.