We only had email and phone contact with Inma, but following an issue during our stay, she was very quick and responsive to solve the problem.
Our stay was mainly headache free, and the flat is pleasant and light, in a particularly nice neighbourhood (never felt I would prefer another, the Alameda de Hercules is by far the most pleasant and lively area we saw), while everything is accessible by foot.
Accomodation is basic, so don't expect extra luxury that are not stated in the ad, but comfortable enough, pleasantly laid out, and very light and intimate.
Sevilla is a great City and we have enjoyed it enormously; we've had no bad experiences trying any of the many places and many tapas on offer, the architecture of the city is stunning, and we spent a great few days there.