Great location, just a few steps from Puerta del Sol -- we walked to all the major sites, and took the metro a few times as well (convenient access at Puerta del Sol). You're in the heart of the city, so there is street noise at night (which is what we expected). We enjoyed opening the double doors to the balconies and being in the city...yet comfortable in the apartment on the fourth floor. Very good check-in experience and communication before and during our stay.