My partner and I had a very nice stay here in Seville for one week. The apartment is close to everything, walking distance to restaurants, shops, and monuments. We loved being in the old neighborhood Santa Cruz, and the views from the roof of La Giralda at night were awesome.
There is a place right out front for taxi pick up and drop off which is nice to not have to rush blocking the narrow road, and rare in the area. The beds were super comfy and felt like hotel quality sheets and pillows.
Be aware as others have said though, you are in the action and the streets are noisy, you can hear people walking and talking in the street very loudly in the bedroom. If you are a light sleeper like me, bring earplugs and white noise on your phone.