Summary - Excellent location, great apartment, super helpful hosts, some unavoidable street noise at night.
A bit more - The apartment was spacious and clean with all the basics provided. Having a lift was a big bonus! Easy walking distance to many Madrid highlights such as museums, plazas, and great restaurants. The metro is nearby for quick access to some farther points. We didn’t take a taxi anywhere besides the airport. The hosts were very responsive to every question and had helpful tips and even booked our early morning taxi for the departure for us with an honest driver. There was some street noise at night but I really think this is the unavoidable reality of the city bolster where you stay. Many of the residents keep late hours, most walk to their destinations, and all live in a very tight space. Overall a fantastic value for an extended stay.