We had a great stay at Javier's apartment for 4 nights. The apartment was extremely clean, very spacious for 2 persons and has a central heating system which I found valuable, since it was quite chill in the night in Seville.
The communication with Javier was great as well, we didn't have a chance to meet him in person but his wife welcomed us at the apartment and let us leave our luggages before the check-in time.
Highly recommended!