Carol and Iván’s place is a few minutes walk to the Royal Palace and the Callao Plaza. In my opinion the location is perfect.
The place was comfortable and had a washer in one of the bathrooms. I did not use it but it looks functional.
Only two downsides is that the apartment is on the last floor of the building and there is no elevator so be prepared for four flights of stairs. Also the ceiling is quite low in some areas. I bumped my head a few times.
I recommend this place 100%