This place has a great location. It is walking distance from Gran Via and all the shops. You can walk to Metro station, bus stops and taxis are very frequent. The only thing is that it can be loud at night because of the location.
The space is spacious, the bedroom has a comfortable bed and a big closet.
It does not have a lift and it is 4 floors. So take this into consideration before booking. The bathroom has a bath tub and a reduced space so it is definitely not convenient if you are traveling with older folks. My dad fell from the tub and injured his leg as it was very slippery and the tub is tall.
The bathroom is a bit older and the space is reduced. You have limited hot water but i believe that is an issue all over Madrid.
Overall, the place is good because of the location.