Carlos's and Antonio's apartment is in a great location and right by a hip up-and-coming neighborhood of Madrid with tons of tapas places, cute stores and bars. The apartment was clean and had the basic amenities, which was just right since we didn't spend that much time there. A/C is in the living room but with all doors open sufficient cool air reaches the bedrooms. The only slight downside is that the room at the end shares a wall with the neighbors shower and there's some noise when they have the water on. However, this was a minor minor issue. We had a great stay!