Staff were very kind and patient with our elementary level Spanish, and elected to speak to us in our native language. They were very accommodating in storing our luggage, since we arrived hours before check-in, and even arranged to have the apartment ready early for us - that was VERY welcome, since we were exhausted after our long trip from the United States.
The apartment was spacious with modern decor. It was very conveniently located on the Gran Via, steps away from a metro station, with a grocery store, pharmacy and numerous restaurants and shops in walking distance. The rooftop bar was lovely, and the bartender was very friendly and made an amazing Mojito! We were a bit disappointed that the rooftop pool was not open, but there was enough for us to do on the Gran Via.
There was no noise at night from within the building, however there was a bar on the back street behind the building that had very noisy patrons that woke me up a couple of times. The master bathroom was spacious and beautifully designed, but there seemed to be a constant aroma of sewer gas, even though the plumbing was functioning normally. It was bearable with the toilet cover down, and the bathroom door shut - we weren't even in the apartment very much anyway. Kitchen was very nice and had all we needed. Mattresses were ok, bed linens and pillows were very nice.
All in all, a mostly pleasurable stay.