The apartment is in a great location, only a minute walk to Catedral de Sevilla and well-located for the other main tourist attractions of the city center. There are plenty of tapas bars in the area and the square in front of the Catedral was filled with locals going out to bars and restaurants when I was out at 10pm on a Friday night.
The building the apartment is in is incredibly charming with the courtyard garden and the apartment itself was clean, cool, and well-maintained. I do not recommend attempting to drive to the apartment -- I had a pretty bad experience trying to navigate the small streets with tourists everywhere -- but public parking is about a 10-minute walk and I was able to make the walk with two small kids, a large suitcase, and a backpack without much trouble, other than my 2-year-old daughter fawning over the horses in front of the Catedral.
It was overall a great experience -- Manuel was very responsive and helpful and we will definitely look him up again if we make it back to Sevilla.