Lovely, clean, modern apartment right on the main avenue of Madrid. Tons of restaurants, coffee shops, and markets all around the place. Extra security with a 24-hour security guard. Beautiful rooftop seating area, gym, and pool.
Only two minor notes—the master bedroom has a double bed so it’s a touch small for a couple but OK. We booked the unit for a few weeks but were only provided one dishwasher/laundry pod (and no paper towels, hand soap in the kitchen, conditioner, etc.) so we had to go out and purchase everything in bulk from scratch. For the price of a 5-star hotel per night, we would've thought those things might be provided. The upside is that the Airbnb should now have plenty for future guests from our purchases. :)
Overall, lovely stay with a communicative host and beautiful, well-located apartment.