This was a really nice little (big) place. Make sure you look for the wooden door on the side of the building! I was so enthralled with the Plaza, that I missed it! But Rachel came right out and helped me up the one long flight of stairs with my bags - she is a gem and took time to explain all the nuances of the place.
The balcony overlooking the plaza makes you feel like you are in a movie set, and although you can hear the goings-on there, it generally was not loud and the din of blended sounds lets you know you are in a vibrant city!
The bed was super comfortable with a nice down comforter - and Raquel put a small heater in the room for me as it was quite cool during my stay. There was enough space to hang and store clothing and there is a full-length mirror in the room, which is always nice, such that you can come back into your room after showering and do your hair/makeup, etc.
The shared kitchen/living/bath were no issue at all. The two other room that were occupied, kept to themselves and our showering schedules managed not to overlap.
While the building itself is old and historic, the remodel of this unit was done quite nicely. I recommend it and Rachel's place if you are looking to stay in the Plaza Mayor area of Madrid!