Juan's flat is great : location is perfect (EVERYTHING is a 15-20 minute walk), the flat has all what is needed and the furniture are of quality (it's not all Ikea style).
We particularly appreciated with my wife having no building in front of Juan place, so you can enjoy the view over Sevilla, and the overall atmosphere of the flat. It's a place you feel good inside, not a generic airbnb flat without charm (which unfortunately, you find more and more on Airbnb).
Also, when you open the window you can bring a lot of air in the flat which is nice in Sevilla when it's getting hot (we stayed there in early May but was already around 30° celsius).
Appart from the flat itself, the communication with Juan was super fluid, Juan helped us on a lot of questions we had on Sevilla and he was super friendly !
It was a pleasure to stay at his place, we would do it again a thousand time !!