My partner and I spent five amazing night in Tom and Jacks apartment in Malasaña. We had a wonderful stay and spent most of time outside of the apartment because of what lies outside your door! You are in the center of shopping, cafes, bars and within 10 mins to other neighborhoods. Great location!
If you are a light sleeper or have issues sleeping due to noise I would either get ear plugs or consider staying out late because people do party into the late hours of the night. Overall we had a great stay and the bed is very comfortable and would highly recommend this apartment!