Pros:
The location was good. It was close to 3 metro stops and a quick walk to Puerta del Sol.
Had a washer which was super helpful
They were very communicative for check-in. I think they handled it well. They even let me change the time (to later) the day of check-in
Cons:
There were little black ants everywhere
The showers were either scalding hot or freezing... no in between. They also got stuck on the on position and the only way to turn them off was the main water shut off in each bathroom (that only my boyfriend could reach)
The heater in the living room barely worked (they came to check it and it went from not working to kind of working), the bedroom heaters were in overdrive.
The beds were not super comfortable... this would be fine for a short stay but we were there for 2 weeks.
There were no basic supplies. We had to even buy trash bags and hand soap. I've never stayed at an Airbnb that had nothing.
You get one towel per person... for 2 weeks?
I would not stay here again. I think it would be manageable for a short stay since who wants to spend all their time in the apartment when on vacation... but I would not recommend it for a long stay.