The appartment is very nice and ideally suited for a family for a city trip. It is next to the Alameda square where all the restaurants & bars are. The old town is 10 min walk but this is already in the centre.
The appartment is clean and modern -it has been recently remodelled- and all equipment etc work just fine. The company that rents out the appartment has a 24/7 backup via whatsapp so you can always get in contact within 15 min or so.
Overall: this is just perfect for a family who would like to visit Sevilla for a week or so. Be sure to rent a bike for a day to explore the city!