Highly recommend Martin’s place! Location is excellent and the apartment is stocked with absolutely everything you could need.
We ran into a few minor issues but Martin was always very responsive and helpful. Communication was exceptional and he also provided good local recommendations.
Checkout process expectations were minimal which was also a pleasant change from some other airbnbs.
Bottom line, if you are looking for a nice spot in Madrid that is walkable/close to public transport then this is an excellent choice!