We had a great stay, as the apartment is located a short (<5 min.) walk from the Anton Martin metro stop. There are a number of tapas bars, restaurants, and shops all within very close walking distance.
The apartment itself was very clean, modern and spacious for two people. It was on the 3rd floor of a walk up building but that is not uncommon for Europe (or NYC where we are from for that matter). Towels, plates, cups, and all the usual items were readily available. There was also a great espresso machine with some mini-espresso cups to use! These were nice to have before starting a day exploring or winding down before dinner.
All in all, would highly recommend to anyone visiting the Madrid area!