We had a great time in Seville (and Córdoba) and Cesar who greeted us at the apartment and helped with some travel queries, was really accommodating. The apartment's location in Santa Cruz is amazing - so central, in fact so close to the La Giralda that it's nearly impossible not to find your way home from anywhere in central Seville.
The apartment is clean and tidy, with plenty of space for a family of four. So, the plus points... location, cleanliness, light and airy, great rooftop patio and a real sense of being in the heart of Seville. The negative points... we've got two kids under the age of 4 so, adapting to late Spanish evenings was always going to be tricky. While being in the hub of Santa Cruz is fun, the bars in the street below were pretty noisy. Pre-kids, this wouldn't have been a problem (as we'd have been in the bars) but with little one's we weren't going to stretch them much beyond their normal sleeping patterns and so we were in the apartment, sleeping with earplugs at night. The kids were fine but in retrospect we would have chosen a quieter location.