The apartment was great. It's a good size, especially for where it is. The kitchen and bathroom were also very nice.
The location is amazing! The pictures in the listing don't do it justice. We were there for three days and never took a taxi or metro. You can walk everywhere. The downside to the location is it can be noisy at night. You're on the second floor just outside Plaza Mayor. Bring earplugs if you're a light sleeper, but it's to be expected in that location.
The host is very friendly and made arriving and leaving very easy.