The apartment is in a great location. You can walk to several gorgeous terraces nearby for a drink in the evening and is really close to the castle, the train station, and around 20mins walk to the more commercial shopping district - which is great as the trams were very crowded. There are also lots of good restaurants nearby, we would recommend “chapito a mesa” by the castle, good for casual dining after a day of walking.
The only thing I’d say is that it is in an old building and we could hear the people in the flat above us walking around a lot at night, so maybe bring earplugs if you are a light sleeper. Otherwise, we would recommend this apartment as a great base to explore.