We would not stay here again. The apartment itself is great, clean and comfortable and centrally located in Plaza Mayor. Unfortunately the neighbor on the floor smokes and the smoke permeates from the adjacent apartment (not the owner's fault, but it needs to be included in the description). We would not have booked the apartment if we had known this.
The apartment itself is one of multiple listings from a company in Madrid - communication and coordination is great, but the feel is not as personal as most Airbnb locations we have resided in.
If the smell of cigarette smoke from the adjacent apartment is not a concern, then this is an excellent apartment in an excellent location at a price comparable to other apartments in the area.