This place was at a fantastic location. It's right in the middle of everything, and yet it's pretty quiet at night. The apartment had everything we needed, we were even able to do our laundry. It was clean, comfortable and warm in the winter with a small heater.
The shower was good, but hot water runs out fast and you have to wait for it to heat again after the first person. Just bare in mind that it's on a 5th floor with no elevator and there's a steep stair in the apartment that connects the living room to the bedroom. However, we felt it was a great place for our stay at Madrid and would definitely come back!