We highly recommend this apartment! The location was absolutely perfect. We walked everywhere. It is right next to the cathedral and the alcazar. We highly recommend taking a tour of both of these with Sevilla Walking Tours with Concepcion Delgado (as well as her Intro to the City Tour).
The apartment itself was lovely. One nice surprise was the washing machine and dryer in the unit. Also, there is a retractable awning for the patio which was really nice. We were able to sit outside a lot even though the temperature outside was high. The awning kept the patio nice and cool. It was also nice to have two bathrooms, unusual in an airbnb. As others have mentioned, the small bedroom and kitchen are about 10 degrees hotter (there are thermostats in each room) than the big bedroom and living area. Make sure to consider this before deciding whether to book this apartment or not. For us, it was a small inconvenience to an otherwise perfect apartment. Happy travels and enjoy Sevilla!