This is a very nice place to stay. It is just a 15-minute, easy walk to the main attractions of Seville. And there are scooters and bikes to rent if you prefer that. Cabify is another option. The apartment is just a 5-minute walk to the river.
Mercadona, the largest and most convenient supermarket chain, is just outside the front door. You can purchase everything you need there, and what they don't have the Chinese-owned bazaar has everything (literally) else.
Matilde is kind and helpful. A real classic. I can't say enough good things.