This place was great! It was in a convenient location, within 20 minutes by foot from the Cathedral, Alcazar, and most other attractions. The house was very cool (designed by José María himself!) and had a swimming pool that was a nice reprieve during the summer days. The room had a working a/c, the bed was comfortable, and he let us use his washing machine for a small fee.
José María is full of great tips about Sevilla that you should definitely take advantage of!