We could not have asked for an easier check-in experience. Mar was very responsive, attentive, friendly, and helpful. The apartment itself was clean and spacious enough for the four of us (two couples). I was worried about having only one bathroom, but it was large, and we had no problem coordinating its use. The kitchen was well-appointed (juicer, coffeemaker, knives, dishware, dishwashing liquid, pans, etc.), and we used it for our breakfasts. We did not have any noise problems from the neighbors or street; the only noise was from the creaking, wood floors within the apartment. The location can't be beat, since it is so close to everything in the center of wonderful Madrid.