Juan is a very nice host and has a nice flat to stay in Seville. He explains a lot about the city and what you should see or where to go. He even lend us a cable to load our camera which was very nice! :)
The room itself is very cozy and clean. There were really no downsides at all! As a tip: you don't need to book a city bus tour. The audio guide wasn't good at all and the price (20 Euro) for two days seem to be okay but unfortunately the tour itself was not worth it. You can explore all the places by foot.
All in all a great place to stay in Seville!