The unit is extremely well located - just about a 3 min walk to Plaza Mayor, a 3 min walk to the subway, and easy access to many of the major sites. And is yet located off of a high traffic area. While the unit is one floor up and there is an elevator to it, you do need to take a few steps to enter the building and inside the lobby. But no biggie. The unit is extremely well appointed, the bed comfortable, and the towels luxurious. The only downside is that there was no soap provided in the bathrooms - which I think is the norm in most AirBnBs in Spain. Rafael was responsive in a timely manner.
Overall, a no brainer to stay at. Would certainly recommend the unit and location.