I've been in Rafael's apartment during the last weekend with three friends and I truly loved it and Seville.
The apartment is excellent, with a brand new and complete furniture, beautiful and modern rooms, and clean and huge bathroom.
The location is really central: a small and quiet lane in the heart of Seville, just 10 minutes by foot from the Cathedral, the Alcazar and the Santa Cruz district.
The wifi is very poor, but it was not a big problem for us.
Rafael is a very dedicated host.
Highly recommended.... don't miss it! :)