The apartment is placed in a very good position to enjoy the tourist part of the city:
with just 10 minutes walking you reach Puerta del Sol!
The apartment has only two very little windows, none of them is in the bathroom (which doesn't even have a fan) and the bedroom is very uncomfortable (it is a mezzanine and it's impossible to stand up straight)!
But in the end, I think it can be a good solution to live in Madrid for a few days!