The place is on the 4th floor without an elevator so if you have heavy luggage, be prepared. We’re not expecting a top-notch experience but some encounters were beyond basic. We didn’t expect a big place but the room is really tiny. The closet smelled moldy and one side of the door was extremely difficult to open. The bed looked like a made-shit queen-size bed but it was okay. The air-conditioner was outside of the room so the only way you can get some cool air was to open the door. Since you may be staying with a roommate, we don't know how comfortable you would be with the door open when you sleep. It wouldn't be a problem in the winter but when we were there, Madrid was so hot.
The shower doesn't drain the water well. The water stayed almost covering your feet during the shower. It slowly drained a couple of minutes after the shower. We were not expecting luxury towels but the ones we were provided looked like washed old kitchen cloths.
We had to go to one place to get the key and the actual place that we stayed was in another location.
The only consolation is that the roommate in the other room was nice.