Antonio's place is literally in the center of Seville. He has impeccable communication, very sweet and very helpful with all questions.
From the airport to the flat it is x2 bus rides however very quick and not far at all from Santa Justa station, in fact you can walk there (10min walk).
Exactly as photographed beautiful warm colours, very very quiet at night, very safe you have to go through 3 doors (incl your flat door).
As you come out of the flat and walk straight turn right at the church and walk a straight 5 minute walk you will reach the famous 'mushroom' (Metropol Parasol).
From there you can continue walking straight and also get to the all the shops (Zara, Mango etc) and from there you can even walk a 5-10min walk to the center where the Cathedral is.
This one is important as you are not told by people in Seville:
Go to the Salvador church first before the Cathedral as you will pay the same fees however get in the Cathedral for free rather than paying twice like we were duped into doing. So you pay at Salvador first then take the same ticket receipt to the Cathedral (you do not need to que up just go to the woman at the barriers and show the ticket)
€9 for adults, €4 teen/students
You do not need buss passes I believe, you can see Seville in literally 2-3 days you can take a boat/horse ride to the main attractions.
If you have kids, the TV only has news channels, so I would recommend bringing a laptop/ipad, as you will not be out walking in the sun all day especially with the siesta etc there so it would be a good idea to use the wifi to watch something on your ipad/laptop.
You are also within walking distance to the nearest medical center and they are very very nice there and extremley helpful! (be sure to take your EU card)
Enjoy!! :)