Nice, clean, tiny place, with good price, but its in very noisy block, with a lot of things going on in the street downstairs. Inside is nice and extremely clean, but forget about the rest indeed - walls are tiny, doors in other rooms are knocking all the time, and the smart locking system the place has is so noisy, that you'll wake up when someone in other room will use that system to lock or unlock the room. Don't want to sound bad, and I'll recommend you this place if you are on your leisure in Madrid, but not for working/business stay over. I left without sleep :)