You cannot find a more centrally located address in Sevilla! We were steps away from the most important sights and within reasonable walking distance from everything else we wanted to see. The grocery store, bakery, cafés, restaurants were all mere minutes away. Very convenient.
This apartment was very comfortable for our family of 4. Each of our teens had his and her own bathroom and that was a plus. The bedrooms were spacious and the beds very comfortable. The living room was also a comfortable place to relax after a long day of sightseeing.
As other guests have mentioned, the street-facing bedroom can be noisy at night/early morning, but this was manageable with earplugs.
You will need to bring your own toiletries as the ones provided are insufficient for stays longer than a couple of days. The kitchen also lacks some basic supplies - we had to buy our own salt and pepper, paper towels, napkins, sugar.
The management company was quick to respond to our various inquiries. Know that they will not replace towels unless you are staying longer than 8 days.
This particular listing was more expensive than others that we had considered but we were willing to pay for the extra space, the extra bathroom and the location. (I do think it is reasonable to expect that this apartment would come better furnished with some kitchen and bathroom basics, however.)