Marina's apartment was in the absolute perfect location! I can't imagine staying anywhere else in Seville. We were centrally located to shops, markets, cafes, bars, and all of the tourists sites (Cathedrals, Alcazar, Metropol Parasol). I think the farthest we had to go was to the Plaza de Espana and even that was a pleasant 20 minute walk through the lovely streets of Seville. Absolutely perfect spot.
The apartment was clean and cozy, perfect for afternoon siestas (necessary when in Spain in June).
Marina was communicative before we arrived and was accommodating when we arrived later than planned (long day of travel from Morocco). However she was non-responsive towards the end of our trip when we had questions about check out and transportation. Hope everything is okay since we still haven't heard back (over 24 hours).