Carlos responded to our messages promptly and was accommodating when our flight was delayed twelve hours forcing us to arrive the next morning. We met Victor who was very friendly and showed us the apartment. He also gave us a map of Seville with recommendations of what to see and where to eat.
The apartment was clean and in a central location (great for walking). The wifi did not work during our stay but Victor said that Carlos is working on getting it fixed. The wifi at the frozen yogurt shop next door was fast and met our needs. The AC is only in the bedroom but will cool just fine if you shut the bedroom door. The mattress could stand to be changed or at least a foam pad put down.
Overall, we had a great stay. Walk to all the major sites and too many great places to eat.