The good:
1) The apartment was well-located (off of Plaza de España and close to major sights like the palace).
2) The air conditioning was very good, during extremely hot weather for the week.
3) Having a washing machine in-unit was super helpful for our traveling family.
The bad:
1) This unit (4D) should not be listed as an AirBnB Plus.
2) From the water stains on the living room ceiling to the mold and mildew in the master bath to the dust under all 3 beds, the cleanliness of the unit left much to be desired.
3) The furniture was functional but cheap, and mattresses worn, leaving us feeling the coils.
4) Noise transferred easily through the walls. This was not an issue until our last two nights, when a group checked into the unit sharing our floor, waking us up at 2:30 AM and 5:30 AM as different groups of them returned from the bars each night.
If this unit had been listed as a regular AirBnB, perhaps we would have overlooked these issues. But we were paying extra for what we thought was a higher quality Plus rental and were disappointed as a result.