The place is one block from Puerta del Sol, excellent place for walking and near so many bars, restaurants and the metro. The apartment is in the back of the building so you don’t hear the street noise. The only things is that the other apartments are so close that you can hear the other guest talking and if you get unlucky with a loud guest you wont be able to sleep specially since everyone comes and goes at all hours. We were lucky to have guest that were mindful.
Other than that the apartment is small but it has everything you need for a short stay and is conveniently located. We enjoyed our stay.