This is a exceptionally clean hotel, my compliments to whoever does the cleaning. I have not once heard any noise by cleaners when trying to sleep, which is ALWAYS disturbing in hotels, Madrid and elsewhere.
Plumbing is very noisy and old.
I was let to see 7 different rooms when I came, so I chose the one I have had before (no 13) because it happened to be the best of those and I like to have a view to the street and look at people. There are rooms with or without bath/toilet as most hostels in Madrid do.
Personnel is very friendly but not over-, which is also a good thing. I overheard them speaking English and French as well.
However, I will not return if given a choice for these reasons:
1. There is no lamp for reading. I need it. 2. There is only one socket, in the bathroom, very high, so charginh a phone demands a lot of innovation. If you have more appliances or more than one person (this is a double room) you're on your own. 4. The A/C is turned of by every once in a while and you have to ask the reception to turn it on again although it SHOULD came back alive when turned on when the balcony door is closed, it didn't, on several occasions. The phone was dead so you'd have to go to the reception to ask this.
5. Wifi is inconsistent and slow.
6. You have your basic Spanish cylinder pillow, only more uncomfortable than most. Guaranteed to give you a sore neck if you're over 20, as I am.
Other than that, the place is fine and the noise from the street didn't bother me, the windows and curtains block most of it. If noise bothers you, ask for an interior room and hope you have quiet neighbours. The walls are thin, but not more than all the other hostels I've been in in Madrid, and I have been in quite a many.