We spent 3 great days in Sevilla. The apartment is great, spacious, very clean and extremely well located. It is about 10 minutes from the city center and the cathedral. It is also very quiet.
We came with a baby (4 month old) and Javier had prepared a baby bed for us which was extremely useful.
Javier is a great host. He waited for us late at night because our plane was late. He showed us the apartment and even helped ordering food for the first night.
It is a perfect spot to stay if you want to spend a few days in Sevilla.