Antonio is a very very nice host. He even helped to keep my friend's luggage who was not staying with me in his house. The room is located at 1/F, Antonio helped me to take the luggage upstairs and downstairs.
The location is also very good. It is only 5 mins walk to the Cathedral and Rea Alcazar. Altough it is near the popular sites, it is quiet enough to have a good sleep.
If I am going to Sevilla again, Antonio's place will be my first choice!