We spent 3 days in the apartment at the beginning of the Semana Santa.
The apartment is quite small but very charming, and was actually big enough for a few days for our family of 4. Also clean and well equiped.
The biggest positive point for me was the location: very close to the usual sightseeing attractions, and also we were right in the center of many of the Semana Santa processions, with a couple of them passing 100m away at night, which was great as it was making it easy for us to go with our young children at night.
A great stay in Sevilla!