Seville was wonderful and having an apartment rather than staying in a hotel made it even better, and made me feel more part of the local scene. The walk into the centre of town was easy and there is a good selection of local grocery shops with the basics. Plenty of cafes/bars/restaurants in the vicinity. If you are a light sleeper take earplugs as a well known and late frequented tapas bar is very close to the flat. It was fine for me.
Luisa was very responsive and helpful. If you have been thinking of going to Seville do so! It was fabulous and in March neither too hot nor too crowded.