Javier's place is excellent. It is on a pedestrianised street and very close to all main Seville attraction like the Royal Alcazar, cathedral, river cruises etc., so you don't have to worry about any transportation as everything is in walkable distance.
Javier also left us some fresh Oranges, very kind of him. The check in instructions were also very clear and he was very accomodating. The best part was that he was always available and suggesting places that helped us plan everything better. There was a slight glitch with the boiler, but that was fixed very quickly. 10/10 for Javier's Airbnb.