If you are going to be in seville than hands down you have to stay at Javier's place. It is not to far from the historic quarter, easy access to bus, 2 floors Javier and his wife live on the 1st floor and you get the whole of 2nd floor. Clean and very big bathroom, access to terrace for a beautiful view of the city.
You will feel like being pampered. Javier is very knowledgeable of the cities history and surroundings and is always available to answer questions.
We absolutely loved our stay and will stay here again when we return.