I was pretty disappointed.
The service was more than excellent but facilities were not as expected.
The refrigerator didn't work, and in this hot weather in Madrid it was just impossible to have cold water during my stay until they replaced it (which disturbed my staying)
There was no electricity next to the bed which I think it's basic. They did solve it somehow with extension cord.
The neighbor in front of the apartment is super loud all day loud talkings.
The apartment is at 5th floor. The building is very old and the elevator feels little unsafe.
If you are a person who like to sleep with total blackout, it's not for you.
Location for me felt little far from where most of the activities go but it's 5 min walk distance.