I had a great time staying at Issac's and Almu's place.
Their house is conveniently located within a walkable distance from plenty of bars, restaurants, clubs and tourist attractions while being away from the tourist traps and very busy city centre. The macarena church is just around the corner and so is the famous Alameda where everyone goes out. You can also reach the city centre on walking which was really helpful.
Really clean and tidy house with a fully equipped kitchen if you need it, a fast internet connection as well as a private bathroom and a charming patio anadalus.
On top of that, both Isaac and Almu are really welcoming hosts that speak both English and German so communication and interaction were smooth and friendly especially that Isaac is quite knowledgeable about the city's history, bars, restaurants or any other tourist attractions.
Muchas gracias to both of them and hope to see you again next time I'll drop by Sevilla.