We're a family of 4 and we stayed at the apartment for a month. We enjoyed the apartment and the terrace, which is a big plus. The neighborhood is very quiet at night but interesting during the day with plenty of things to visit (I recommend Palacio de las dueñas, San Louis de los franceses, basilica de la Macarena), as well as restaurants and supermarkets.
Communication was great and check in/check out was easy.
The school right next door is pretty noisy from 9am until quite late in the evening because of after school programs but it didn't bother us.
Overall a great place to stay to enjoy Sevilla!