This apartment is in the best location I can imagine. Our hosts said it was the "center of the center," and they were right! It is close to all the major sights and restaurants and bars. We walked everywhere, never taking any public transportation. (It's also a quick taxi ride from the train station and the airport.) An added bonus is that it is also close to the best gelato.
The apartment has three A/C units, one being in the bedroom. That means the bedroom door can be closed for privacy if someone is also sleeping on the sofa bed.
The apartment is decorated nicely, and Cristina has thought of your every need -- from a night light in the bathroom to a well-stocked bathroom (toilet paper, tissues, toiletries, shampoo, soap, etc) and kitchen (drinks and food in the fridge waiting for us). Both Cristina and her husband gave us a warm welcome, providing us maps, directions, recommendations, and then followed up with email and responded immediately with more wonderful suggestions of places to visit. It is obvious that they enjoy their apartment and also enjoy sharing it with others.
I would jump at the chance to visit Sevilla again, and I would definitely stay here again.