We really enjoyed our stay here in Feb 2018 (2 adults and 1 child). The apartment is quite nice inside with a full washer and dryer really helping out those of us who travel only with carry-ons.
The location is quite good with the Plaza Mayor literally being around the corner and Calle Atocha (one of the main roads) under a block away.
We stayed somewhere else on our first few days in Madrid and really wished we had this apartment the entire time as it really was that much better for only about $5 more per night.
Communication with the hosts was excellent and they really were accommodating and responsive. If we make it back to Madrid I'll definitely try to book this apartment again.