This place is fantastic! Super central (you can park your car in Javier’s garage and forget it for the rest of your stay), in a nice quiet street in a beautiful small building. The apartment is big and comfortable (we were seven - four adults and three teenagers) and internet was super fast (very important for teens, not bad for us either). The rooms and bathrooms already look nice in the pictures, but the pictures do not do them justice, they are actually nicer.
We were greeted by Maria and what struck me was her enthusiasm to give us advice about her city (where to eat, buy food, things to see and do), we really appreciated it very much Maria, thank you. Though I never met Javier, we WhatsApped, voice messaged, and spoke on the phone and he was always ready to give advice, or solve a problem should it arise (we did not have any).
I would warmly recommend Javier and his apartment to anyone visiting Seville.